CO AL AGE
W ith W h ich is C o n so lid a ted
The C olliery E n g in eer > 3 7 5 / 2 ^/
INDEX TO VOLUME XXV
J a n u a r y 1 to J un e 30, 1924
N O T E — T h e a rtic le s a n d re fe re n c e s in th is in d e x h a v e been classified u n d e r lead in g sub- je c ts o r topios, a s f a r a s p ra c tic a b le , an d sh o u ld be so u g h t u n d e r su c h h ead s, w h ic h to g e th e r w ith a ll u n classified m a tte r a re a rra n g e d alp h a- b e tic a lly . I llu s tra te d a rtic le s o r c u ts sta n d in g b y th e m se ly e s are in d ic a te d b y a n a s te ris k ( * ) . A ll e d ito ria ls a p p e a r u n d e r t h a t su b je ct, each h a v in g its e x a c t title . E lsew h ere th e su b je ct m a tte r o f a n e d ito ria l w ill be fo u n d classified an d m a rk e d ( e ) . M any title s o f a rtic le s are a b b re v ia te d , th e a im b e in g to give pro m in e n ce to im p o rta n t w orls.
F o llo w in g is a list o f th e p ag es in clu d ed in e a c h issu e o f th e vo lu m e, to g e th e r w ith d atc a n d n u m b e r o f th e issue, f o r convenience of re fe re n c e :
N o. P p .
J a n . 3, 1 ... 1 - 3 2 10. 2 ... 3 3 - 6 1 17, 3 ... 6 5-124 24, 4 ... 125-16U 31 , 5 ... 161-194 F e b . 7. 6 ... 195-230
14, 7 ... 231-266 21, 8 ... 267-302 28, 9 ... 303 -3 4 0 M a rch 6 , 10 ... 341-376 13, 11 ... 377 -4 1 2 2 0 , 12 ... 413-448
" 27, 13 ... 449-482 A p ril 3, 14 ... 483 -5 1 8 10, 15 ... 519-554 17, 16 ... 555-590 2 4 , 17 ... 5 91-624 M ay 1, 18 ... 625-660 8 , 19 ... 661-712 15, 2 0 ... 713-750
22, 21 ... . . 751-794 29, 22 ... 795-828 J u n e 5, 23 ... 829-864 12, 2 4 ... 865-898 19, 25 ... 899-932 2 6 , 2 6 ... 933-968
P ag e A ccidents See also “F a ta litie s ,” “ E x-
p losions, M ine.”
— Add f o u r p e r cen t to o p e ra tin g c o s t. . . . 388
— E n g lish vs. A m erican coal m in e s ... 388
— Coal-m ine accidents in G rt. B r it a i n . . . . 4 27 — F a ta l accid en t n a rro w ly a v e r te d ...*182
— F o ru m w ith S a fe ty C ouncil to reduce ac cid en ts ... 3 23 — L o w est ra te . P e n n ... 388
— M iner lo st in Z eigler N o. 1 m in e ... 361
— M t. Je ss u p d isa ste r, P re c a u tio n s sug- — R a te s in fo re ig n c o u n tr ie s ... 4 3 gested b y ( e ) ... 125, 146 — C lassificatio n o f tim e lo st b y a ccid en ts; ta b le ... . ^iibi s. . . . 528
— 'Glen A lden m in es flooded ... : . . . 576
— -Percentage due to d i f f e r e n t ^ a u s e s ... 632
— N a tio n a l m ine, Glen\. A laen Coal Co., flooded ... ...V? • — D eath s in A p ril in coal m inesi, ta b ie y ,.. 920
— Old m en m ore su b je ct to a c c id e n ts... 941
— G ro u p cla ssific a tio n o f ac c id e n ts: ta b le 942 — A cid -re sistin g v a lv e ...*776
A ezol f o r p reserv in g m in e tim b e r ... * y x A la b a m a — C orona Coal Co. files a p p e a ls ... — New coal r a te s ... _... 61
— D em and fo r co m m ercial coal d e c lin e d . . . *102
— P ric es. R a n g ę of, 1 923. ta b le : M t. 01ive d ist.. St. L o u is m a rk e t, t a b l e ... 103
— C onvict la b o r m u tin y ... 115
— Coal. C lass o f ... 171
— R evised L . & N . R .R . ra te s , effective M ar. 1 ... 2 9 9 — • W eight loss, C onsignee m u s t b e a r ... 337
— T h e ft o f fe d e ra l coal re s e rv e s ...363. 4 7 0 — D eep w a ter C. & I . Co. b u y s m o re coal la n d s ... ... 4 6 8 — Coal o u tp u t. R a p id in c re a se i n ... 109
— A la s k a n E n g in e e rin g C om m . u rg e R .R . ex te n s io n s ... 209
— C h ickaloon m in e o p erated b y A la sk a R .R ... 245
— Coal leases, S en ate to a p p r o v e ... 286
— T ra n s fe r o f c o al la n d s fro m N av y to I n te r io r D e p t... 327
A lem ite lu b r ic a tin g system fo r ro d bear- in g s ...*711
A llo w ab le sw eep in w ood p oles: t a b l e . . . . 766
A m o rtiz a tio n claim allow ed B erw ind-W hite C. M. Co... 542
A n alv ses ~ V a l l e y field co al, V a .; t a b l e ... 270
M ine w a te r: t a b l e ... 365
„__ M in e a ir r e t u r n fro m flre; t a b le s ... 382
Coal f o r c lin k e rin g te m p e r a tu re s ... 401
.__ C oal. L ethbridere, C a n a d a : t a b l e ... 461
..__ B e ck ley coal, W. V a .; t a b l e ... 4 8 5 ^ ? R a t e ° h e a r i n g s , A ll-rail, W . V a. to N ew E n g la n d ... 29
W elsh a n th r a c ite , S u p e n o n ty o f ... 4 7 P u b lic ity o f coal e o .’s a c c o u n ts a s k e d ... 52
P ag e A n th ra c ite — C ontinued — P ric e s f o r eleven y e a rs; d ia g ra m ... *75
— S ales decrease ... 144
— E x h ib it a t W ash in g to n ... 147
— C lassificatio n ... 170
— B u rn in g a n th r a c ite d u st, N ew fu rn a c e f o r ...*175
— Clean coal, G eneral h ig h sta n d a rd (e) . . 195
— A sh in com m ercial a n th r a c ite : ta b l e . . . . 272
— R e ta il d ealers sto c k s; P ro d u c tio n an d de- li\neries ... 327
— S o lutions of pro b lem s suggested (e) . . . 377
— Sm ali sizes, B est fu rn a c e fo r b u rn in g . . *389
— S afer and m ore econom ical th a n o i l . . . . 398
— Sm ali sizes, R aise s ta n d a rd in prep ara- tion of (e) ... 413
— Irre sp o n sib le dealers h a rm a n th ra c ite tra d e (e) ... 449
— 'New E n g la n d dealers assail q u a lity of co al ... 471
— A n th ra c ite d u s t can b e exploded; W heeler 490 — D om estic use of sm ali sizes ... 568
— M aking fine sizes m ore s a la b le ...*673
— S o u th W ales coal fie ld s... *726
— O p erato rs nam e A dvisory c o m ... 734
— A tta c k s a n th r a c ite t a x ... 736
— G as an a c tiv e riv a l o f a n th r a c ite ; Car- p e n te r ... 766
— S u rp lu s of fine coal. E ffo rts to reduce (e) ... 796
— V a ria tio n s in q u a lity , E ffect of (e) . . 900
— At w h a t h e a t w as a n th r a c ite f o r m e d ... 906
A n ti-fric tio n b earin g s low er tr a n s p o rta tio n c o sts; K neeland ...*603
A rk a n sa s — Coal, Class o f ... 171
A sh in coal, F u sib ility of (e) ... 661
— A sh in ro ad d u s t lessens d a n g e r ... 686
A s o th e rs see u s ... 725
A sso ciatio n s — A .I.M .E ., A n n u al m eeting, 1 4 4 : A u tu m n , 2 4 9 ; R e p o rt of a n n u a l m eeting, 3 2 0 ; I n d u s tr ia l re la tio n s com ., 3 50, 3 8 8 ; P ro g ra m , 2 4 8 ; R e p o rt ... 321
— A .I.E .E ., B irm in g h am m eeting, 3 2 0 ; Le- h ig h se ctio n ... 611
— A m er. Mg. Congress, Officers and sp e a k e rs ... ...*676-7 — A m er. H ardw ood In s t., To com pile d a ta . 778 — A m er. Ry. Assc., New q u a rte rs Car-Serv- ice D iv., 2 6 3 ; Seek F u el-R esearc h Bu- r e a u ... 608
— A m er. W holesale Coal Assc., S tudy oil co m p etitio n , 6 96; P la n s convention, 6 4 4 ; A n n u al co nvention, 7 3 8 ; U rges Coal I n s t ...*880
— A m er. W elding Socy... I 7 x — A rm y O rdnance A ssc., E n g rs . s tu d y w a r p ro b le m s ... 2 5 2 — Coal Mg. In s t. o f A m erica, D isc u ssio n s.. 2 4 3 — E n g lish Co-op. W holesale Socy., 2 8 2 ; O perates ow n c o lliery ... 283
— F ed. T ra d e Com m ., H u n t succeeds M ur- do ck ... 85S — H a m p to n R o ad s Coal A ssc... 373
— 111. M g. In s t., T h ree-d ay o u tin g . 9 1 7 ; T ech. sessions ... *9411
— In s t. f o r G ovt. R e search u rg e s ab o lish in g B u re a u o f M ines ... 141
— K y.-Tenn. Coal O p e ra to rs’ A ssc. sign o p en-shop p a c t ... 502
— M ine In s p . In s t. of A m erica, P ro g ra m , 6 0 8 : A n n u a l m e e t i n g ... 80'/
— M ine-S afety A ssc. o rg an ized in P a ... 248
— N a tl. Coal Assc. (See also “ B u re a u of Coal E eo n o m ic s” ). No coal d ic ta to r em ployed: C o m m ittees ap p o in ted , 1 1 0 ; S tre am p o llu tio n b ills. 2 1 7 ; Com. to s tu d y Oddie b ill f o r D ept. o f M ines. 2 1 9 ; Com. to a rra n g e c o n v en tio n , 2 8 6 ; T o m eet in C in cin n ati. 3 63. 3 9 7 : Tw o 111. o p e ra to rs b a c k . 6 1 1 : P ro g ra m fo r m eeting, 6 9 7 ; E le c ts p resid en t, 7 7 0 ; W eil kn o w n in W ash in g to n , 7 8 1 ; W h o ’s w ho in v o tin g s tre n g th ... 782
— N a tl. I n d u s tr ia l C onference B o a rd ... 362
— N a tl. R e ta il Coal M ch ’s. A ssc.: P le a to ab o lish G ovt. fu e l y ard , 4 9 : M idw est re ta ile rs n o t to w ith d ra w . 1 1 3 ; U rge co-op. coal I n s t., 2 1 9 : C o n v e n tio n . . . . *883
— N a tl. S a fe ty C ouncil to m e e t ... 6 0 4 -H N ew E n g la n d C oal D ealers A ssc., A n n u al co n v en tio n ... 471
— N o rth w e ste rn T raffic an d Seryice B u re a u , 578 — P e n n . R e t. C oal M chs. A ssc. scan tra d e p ro b lem s . ; ... 850
— P itts b u r g h Coal ‘P ro d u c e rs A s s c ... 2 4 9 — R ocky M t. Coal Mg. In s t. m e e tin g ... 328
— T ex as R e t. C oal D ealers A ssc. u rg e s sum - m e r b u y in g ... 849
— T rad e asso ciatio n s, V a rio u s ... 613
— U. S. Coal Com m ., R e p o rt to b e p rin te d , 850 — U. S. S h ip p in g B oard opens b id s ... 738
— U n ited E ng. Socy., E le c tio n o f officers, e tc ... 218
— W a sh in g to n A cad. o f Sciences. D iscussion 145 — W . V a. Coal A ssc. re-e le cts o ffic e rs... 7 8 2 — W . V a. In s t. to d isc u ss s tr a y c u rre n ts, etc., 8 1 4 ; D iscusses s a fe ty m easu res. 949, 954 A u s tra lia — S trik e s to fo rc e g o v e rn m e n t o w n e rsh ip o f m ines ... 323
P a g e B B alan ced m in es sh o u ld h a v e ro c k -b o tto n c o sts; A n d erso n ... 6 3 7 B a llistic m o r ta r t e s t s ... 668
B a rrag es v e rsu s co a tin g s y s te m ... 9 0 7 B a rric a d e sa v e s lives, F ro n tie r m ine, W yo. *150, 2 4 2 B a rrie r, “ Old B en” c o n c e n tra te d sto n e -d u st..* 6 8 7 ‘ B a ttle a x e c o a l” a n i D em psey ( c ) . . . 3 7 8 , 398 B earings — A n ti-fric tio n ro lle r b e a r in g s ... * 6 0 3 — Bali b e a rin g s on m ine c a rs; L o co m o tiv e d riv e s h a f t ... *605
— C onveyor b e lt o p e ra te d on ro lle r b e a r in g s ... *606
B elt splices, D irection to r u n ...*922
Bids (Coal) — N avy ask s bids, 5 1 ; Opens bids, 1 44; Seeks b id s fo r y e a r’s s u p p ly ... 698
— New Y o rk C ity seeks bids. 5 0 4 : Coal com p’s. su b m it bids, 5 7 8 ; School bids opened ... 610
— U .S. S hip p in g B oard opens bids in N. Y., 608, 7 3 8 : N arro w rangę of bids. 778: Opens m ore bids. 81 2 ; Keen com p etitio n , 81 3 ; M ore b id s opened. 88 2 ; C o n tra c ts aw arded on secont1 b id s. . . . 852
— 'Govt. F u el Y ard seeks b i d s ... 73S — B u re a u of M ines o pens b id s ... 852
B lastin g . See also “ E x p lo s iv e s.” — Best m e th o d s o f sh o o tin g c o a l; Good ta m p in g affords s a fe ty : B re a k e r sh o t th e h e a v ie s t: A ir c u sh io n s a d v is a b le . . *646
— Dry b a tte r y a m enace in b la s tin g ... 184
— F u se s th a t c a n n o t be u n d u ly s h o rte n e d . . 3 2 3 — P ro p e r a ir spaces in c h a r 6m g n o le s. . . . *2 5 5 — R ock-dust ste m m in g q u en ch es f l a m e . . . * 8 0 5 — R eoom m endations by M ine Inspec. I n s t.. 807
— S a fe ty p ow der f ia s k ... *230
— S h o rt fu ses d a n g e ro u s ... *291
— -W ater c a rtrid g e in b la s tin g c o a l ... *50f> — W eight o f sin g le c h a rg e in G rt. B r ita in . . 4 2 6 — W hy sh o ts explode p r e m a tu re ly ... 292
Blow ers, see “ F a n s a n d B lo w e rs.” B oilers, S team — B oiler-room in stru m e n t b o a r d ...* 2 1 1 — B oiler and p o w er-h o u se o p e r a tio n ... 271
— C ontrol o f c o m b u s tio n : F lu e gases, etc. (In q .) ... 2 2 — U nderfeed sto k e r ...*26i> Boilers — L o sse s in o rd in a ry o p e r a tio n ...*389
— U nderfeed sto k e r w o rk s, H ow m o d e r n .. *347
Book N otices — ‘ G overnm ent O w nership o f Coal M in e s;” Jo h n sen ... 171
— -“ E le m e n ts o f S to ra g e B a tte r ie s ;” Ja n sk y and W ood ... 2 36 — “ Splices and T a p e s ;” O konite Co., P as- saic, N. J ... 271
— “ T h eo ry and T ra c tio n of M ine V entila- tio n ;” B ryson ... 804
— “ M in e rs’ W ages and Cost of C o a l;” L u b in 871 B ro ad casted p ro g ra m received in m in e ... *358
B ru celo n Mine — G u n ite te s t in ex p lo sio n ... 5 6 — M ine-rescue signal sy stem s in r e s t i g a t i o n . 1 3 9 B u ild in g C o n stru c tio n — tBuilding h u g e m ine, Illin o is Coal C o rp . . . *535
— In te rio r view of b itu m in o u s t i p p l e ...*764
— Im p ro v ed Steel s ta ir t r e a d ... .. .* 7 9 4 — M e ta l-c u ttin g to rc h ... *794
— T h e rm a l (111.) N o. 4 tip p le. D onk B ros. C. & C. C o...*93G — M a n ag em en t to fu rn is h d a ta fo r new tip p le ... 834
B ulging sto c k room b e g g a rs its o w n e r. . . . 757
B u reau of Coal E conom ics — D iagram s sh o w in g p ercen tag e of fu li tim e o p eratio n and cau ses o f tim e lo st in fo llow ing s ta te s : Illin o is ... 9 9 In d ia n a ... 9 9 K e n tu c k y : H a z a rd field: H a rla n field. 8 9 : N o rth e a ste rn field, 1 0 5 ; W estern field ... 1 0 9 O hio: N o rth and c e n tra l d is tric ts ; S o u th ern d is tric t ... 88
P e n n s y lv a n ia : C e n tral fie ld : S om erset C ounty, 9 0 : P itts b u r g h d is tr ic t; W estm oreland d is tric t ... 9 7 Y ir g in ia : So. A p p a l a c h i a n ... 108
W est V irg in ia : P o c a h o n ta s d is tr ic t: T u g R iv e r d istric t, 9 2 : C um b erlan d - P ie d m o n t d is tr ic t; F a ir m o n t reg io n 9 3 ; W inding G u lf d is tr ic t: New R iv e r field. 9 6 : K a n a w h a d is tr ic t: L o g a n d istric t, 1 0 2 ; K enova- T ra c k e r d is tr ic t ... 105
— D ia g ra m s sh o w in g p rice ra n g ę o f coal 1 9 1 3 -1 9 2 3 . on m a rk e ts , f o r coal m in ed in fo llo w in g s ta te s : Illin o is : C e n tral field. 8 8 : S o u th ern field. 8 7 : S ta n d a rd fields. 1 0 0 ; M t. OUve d is tric t ... 101
I n d ia n a : V eins N os. 4 & 5 ... 89
K e n tu c k y : E a s te rn field, 9 7 ; W estern field ... 9 9 O h io : H o ck in g d is tr ic t, 1 0 6 ; P i t t s b u rg h N o. 8 d istric t ... 98 P e n n s y lv a n ia : C a m b ria an d S om erset
C o u n ties. 9 1 : C learfield d is tric t, 9 2 ; P itts b u r g h d is tric t ... 9 5
January-June, 1924 C O A L A G E
/»'.
1
■ PageB u re a u of M ines U . S. ;i*-~
— A p p ro p ria tio n9 bill p a te d ... 147
— A p p ro y al o f self-rescue d e v ic e ... 420
— A w ard s coal c o n tra c ts t ... . * .956
— B u re a u of M ines and the" coal in d u stry (e) ...23/v — D ept. o f M ines p ro p o sal n o t fa v o re d . . . . I b — D irecto r B ain tells needs of th e b u r e a u . 886 — E x p e rim e n ta l w ork, M ine-rescue aignal sy stem s ... ... 139
— H illm an Coal Co.’s offer to stu d y me- ch an ical loading ... 644
— M ove to b ro ad en b u re a u a c tiv itie s ... 469
— N ew sa fe ty film ... 250
— O pens b id9 fo r eupply of c o a l... 852
— R adio e x p e rim e n ta l la b o ra to ry ...*803
—-Recom m ended a b o lish e d ; S en ato r Oddle d efen d s b u re a u ... 147
— R ecord o f 2 7 5 lives being saved by bar- ricades a g a in st gas ... 242
— S afety service w o rk ...3 21, 323 — S h ak e-u p in B u re a u of M in e s... 954
—‘“ Sm oke a b a te m e n t,” Tech. p a p e r No. 273, ju s t p u b lish ed ... 422
— T e sts ą u a lity of a n th ra c ite deliveries in M a ss... 272
— T o in v e stig a te screenings p ro b le m ... 394
B u tle r Bros. la s t d rag lin e ... *836
C a lifo rn ia 0 — Coal deposits, I n v e s tig a tin g ... 21/5 C an ad a „ — -Alberta Coal Sales A ct ( e ) ... 2
— A lb erta coal o u tp u t g T O w s... 361
— A lb e rta expecting tro u b le ... 644
— A lb e rta m in ers strik e ... — A lb e rta seeks to fili th e coal b in s of C a n ad a: Geddes ... .. • • • • 867
— B a rre tt resigns, p ro v isio n al p re st. U. M. W ... 5 °4 — B ritish Colum bia, 1923 o u tp u t, 25 2 ; Gloomy o u tlo o k ... • • 3 - J — C ape B reto n Islan d . Big coal develop- m en t a t ...; ...JfJJ — C oalm ont Collieries, W ilson tu n n e l... 3oo — Coal o u tp u t, e x p o rts, im p o rts, consum p- tio n ; ta b le ... 780
— Coal re so u rces of Canada. b y p rovinces; ta b le ... 867
— D om inion m iners r a tify p act and re tu rn to w o rk ... 328
— L ig n ite s trip p in g in S a sk a tc h e w a n . . *87U — L eth b rid g e coal field developing rap id ly ; T u rn e r ...*459
— M ines a t Cardiff, and P em bina, A lb e rta .. *868
— M iners w a n t m ore p a y ... 397
— N o v a S co tia m in ers reject wage agree- m en t ... ... 399
— N o v a Scotia, T h e u n io n in (e) . . . 449
— N o v a S co tia strik e , 1 4 6 ; E n a s; M iners get increase ... 284
— P eace R iver canyon, F in d good coal in . . 1-29 — S trik e loom s in A lb e rta ... 436
— S trip p it a t D rum heller. A lb e rta . . . . *869
— Sydney m ines. N. S., L ongw all system in 948 — Y an co u v er coal reserv e said to be over- estim a te d ... 781
— W elsh coal seeks C a n ad a’s a n th ra c ite m a rk e t ... 882
C ar D um ps. K ickbacks, etc. — R o ta ry d u m p s f o r h an d lin g t r ip s ... 86
— R o ta ry 2 -car d u m p and k ic k b a c k ... — G rav ity -o p ^ rated r o ta ry lu m p ... 776
C a r-ra tin g o f m in es ... 770
— Congo c a r m o v e r ... *64Cars — L a rry -c a r service, M otors f o r ... *237
— C a r bo d y b u ilt o f c o rru g a te d s h e e ts . . . . 357
— S ta n d a rd iz a tio n in m in e c a rs ( e ) ... 520
— B ali b e a rin g s on m ine c a rs ... 605
— W idely v a ry in g ty p es in u s e ... 725
— -Dump car, 15 to n s, c u ts s trip -p it c o s ts .* 7 2 8 — C a r-g re asin g m ach in ę. L in c o ln ...*772
— L a rg e c a r f o r m a c h in ę lo a d in g ...*775
— A u to m a tic c a r coup lin g show ing p a r ts . .* 7 7 7 — M aking c a rs la rg e and Iow fo r m achinę lo ad in g ... — G rease c a rs w ith bicycle p u m p ... *8o4 — M ine c a r e ą u ip p e d w ith one-piece d rop b o tto m ..._...*932
C artridge. See “B la stin g .” C ast iron — C hem ical specifications undesirable, W hy. 1,89 C astleg ate b la s t due to c o n ta c t of gas w ith open lig h t ...*431
Cement — P ro d u c tio n of P o rtla n d cem ent ... 185
— R o c k d u st f o r b a r rie r s fro m cem ent p la n t 660 — Cem ent th a t m a tu re s in 24 h r ... 727
— C em ent gun u se l f o r ro c k d u stin g m in es 800 C ensus ta k in g in d isp e n s a b le ... 363
C hain. C om pensated, flexible, sile n t S te e l.. *712
C h a m b e r o f C om em rce, U . S. to d isc u ss. . . . 611
C h a m p io n sh ip fo r lo a d in g c o a l ... 738
C in cin n ati C onvention — P la n s and m a c h in e ry e x h ib it ... 607
— Officers an d sp e a k e rs ... *676-7 — W h a t is to b e th e o u tco m e ( e ) ... 751
— N ew e q u ip m e n t s h o w n : K n e e la n d ... *772
C learfield B itu m in o u s C orp. B u ild in g . . . . *792
C leveland c o n v en tio n , R e p u b lic a n p la tfo rm ; W o o to n ... 9 16 Closing dow n m in es (e) ... 79r. Coal. See also “ A n aly ses.” — Coal Sales, S h o rt-lin e w ay s o f h a n d lin g . *7 — C om bustion. C o n tro l o f ( i n q . ) ... 22
— B in d er f o r co al b r i ą u e t s ... 32
— 'B u rn in g coal, E q u iv a le n ts i n ... 22
— O u tp u t 1 9 2 3 exceeded b u t once in peace tim e (e) ... 65
— “ W ooden c o a l,” p ressed sa w d u st b riq u e ts. 112 — S torage. E n g in e e rs’ r e p o rt on c o a l... 146
— C lassify in g coal f o r b u y in g . * 1 0 7 ; T y p es and classes. 1 6 8 ; G ra d in g ... 170
Coal. See also “A n aly sis”— C ontinued — In c o m b u stib le y o latile m a t t e r ... 160
— S p lin t co al; Cannel coal, 1 6 8 ; W estern s ta te s coal ... 171
— P u lv e riz e d coal b u rn e r, T ry in g o u t . . . . 184
— In v e stig a te C a lifo rn ia coal d e p o s its . . . . 212
— -Soft coal sto c k p ilcs n e a r p eak , 3 2 5 ; Dis- t r ib u tio n b y classes of co n su m ers; ta b le ... *325
— Coal discovery in So. w est A f ric a ... 327
— Coal saves f r u it ... 3 6 4 — T h e ft o f fed eral reserv es in A la ... 363
— R estoring confidence in th e in d u stry ( e ) . 378 — C om bustion in fu rn a c e ...*390
— A p p raisal of coal fields (e) ... 413
— A nalyses of co al; see “A n aly ses.” — U n m a rk e ta b le coal in seam , D eterm in in g .* 4 6 5 — V o lu m etric te s t o f c o a l... *465
— S torage p la n in coal c o n s u m p tio n ... 469
— C ru sh coal to m eet m a rk e t needs; Kill- P age m an ... *490
— O xidation cause o f m ine f ire s ... 509
— F u sib ility of ash, E ffect o f ( e ) ... 661
— T estin g coarse-sized coal ... 568
— Coal a f a c to r in re p a ra tio n s se ttle m e n t; W ooton ... 577
— Com posite c h a ra c te r of co al; ta b le . . . . 634
— C onsum ption d rops ... 64ż$ — L o w -te m p e ra tu re ca rb o n iz a tio n o f c o a l. . 732
— B itu m in o u s coal loaded a t L a k e E rie p o rts ; ta b le ... 734
— Coal co n su m p tio n in p o w er p ro d u c tio n d ro p s ... 738
— fB itum inous m a rk e ts show little c h a n g e . 741 — F lo a t-a n d -sin k te s t by “ D elatester” ...*772
— D issim ilar coals fire a t c o n ta c t s u rfa c e . . 841
— Oil v e rsu s coal ... 885
— C o nsum ption an d p o w er o u tp u t d ro p . . . 886
— T ra n s p o rta tio n h e a rin g s a t W ash in g to n . 641 — C o n tracts aw ard ed f o r N . Y . I n s titu tio n s 918 — C o n tra c ts aw ard ed fo r N av y Y ard s and sta tio n s ... 920
Coal Com m ission, U. S. — W ork of Comm. h ig h ly com m ended. . . . 110
— W hat w as accom plished ( e ) ... 341
—iD eductions on a n th ra c ite v a ry fro m f a c ts ; P a r k e r ... *493
— P rin tin g re p o rt, M oses w eak e n in g o n . . . . 540
Coal C u tte rs. See also “ E q u ip m e n t.” — A rcw all coal c u tte r a p p ro v e d ... 660
— U n d e rc u tte r a t w o rk in H o llan d m in e . . .* 6 9 9 Coal In s titu te , N eed o f ( e ) ... 713
Coal-M ine F a ta litie s — T a b u la te d b y sta te s and c a u s e s ... 18
— E lec. & m ech an ical eq u ip m en t in creases fa ta litie s, B a in ... 14 o — F a ta lity ra te s decline, U. S ... 18, 540 — F a ta litie s in 1923, F e w e r ... 250
— M onthly r e p o r t s ... 364, 540 Coal M ining. See also “M anagem ent, M ine.” — M erger of coal com panies in D l... 20
—‘A m erican vs. E u ro p e a n m e th o d s ... *41
— B ritish coal in d u stry can le a rn fro m A m erica ... 47
— M erger o f coal co m p an ies in O h io . . . . 49
— M echanical loading, P ro g re s s o f ... *67
— Engrineering p ro g ress 1 9 2 3 ... 77
— S trik es an d c a r sh o rtag es. E ffect o f (e) 126 — M odernizing m in in g p ra c tic e ... *131
— Q u ality in p ro d u ctio n , Certified (e) . . . . 162
— M erger, P itts b u r g h Coal Co. ta k e s o ver R eiss in te re sts 219 ... 362
— M ergers only hope, “C onsolidate” th e ery, 249 (e) ... 268
— M a ste r m inds needed in coal in d u s try . . 276
— Seeing th in g s as m in in g m en see th e m . . 310
— Coal-m ining problem s, C arnegie I n s t. will s tu d y ... 315
— E u ro p e a n an d A m erican m eth o d s con- tr a s te d ... 320
— W estern Ky. con so lid atio n ... 327
— P itts b u r g h Coal Co. ta k e s o v er R eiss in te re sts ... 362
— G o vem m ent ow n ersh ip and co n tro l (e) 753 — K eeping m ines fre e fro m dust, explosions 769 — R efuse in coal, W h a t to do w i t h ... 810
— Coal in d u stry aw ak e n ed to v a lu e o f p a in t; B rosky ... *901
Coal S to ra g e — S to rin g s o ft coal, W h a t to avoid w hen; H o sk in ... *840
— D issim ilar co als fire a t c o n ta c t s u rfa c e . . 841
— S u m m er sto ra g e b y r a ilro a d s to level coal p ro d u c tio n ... *847
Coal 8 trip p e r u se s ic e -h a rv e ste rs’ m e th o d ..* 4 l5 Coke and Coking — B y p ro d u ct coke fo r d o m estic use, A dvan- ta g e s o f ... 39
— R u les f o r b u rn in g coke ... 40
— Coke situ a tio n in F ra n c e ... 105
— B y p ro d u c t coke o u tp u t. Decline, 1 1 4 ; N ew reco rd 1 9 2 3 ... 218
— B y p ro d u ct v s. b eeh iv e coke, M o n th ly a v erag es ... 114
— E s tim a te d c o n su m p tio n of coal in m fg. o f co k e ... 114
— B y p ro lu ct and beeh iv e o u tp u ts 1913- 1 9 2 3 ; P ro d u c tio n b y s ta te s ; ta b le s . . 218
— B y p ro d u ct coal reserv es ... 326
— H ig h -p ressu re g as tra n sm iss io n lines (e) ... 795
Colorado — H u m id ify in g m ine difficult ... *386
— C a stle g a te m in e e x p lo sio n . .3 9 5 , *431, 503 — R a to n m esa reg io n ... 630
C om m issary. C om pany ... 573
C om pensation, W o rk m a n ’s — R e v isio n o f law s a n d co -o p eratio n needed (e) ... 231
— S avings in co m p en satio n ... 322
C om pressed A ir — S to n e d u s tin g b y com pressed a i r ...*663
— W eil b alan ced a ir c o m p re ss o r...*82S — D u st blow er. C om pressed-air ...*910
C oncrete — P re c a s t co n crete fo r lin in g s h a f t ... *437
— W ood vs. co n c re te f o r lin in g s h a f t ... 492
Concrete— Continued — W ater p o w er ap p lied to b re a k co n crete. .* 5 0 8 — R einforced concrete tip p le . . -mJ - ... *557
— A rch, concrete, th ro u g h f a u lt ... *559
— Stable, Concrete, u n d erg ro u n d ... *561
— C oncreting s h a ft w hile h o istin g con- tin u e s; P ow ell ... ...*61*/,
Congo c a r m over ... ...*64
Congress w a n ts to do w h a t is r ig h t b u t lo oking fo r counsel ... 765
C onsolidation Coal Co. sto c k is s u e ... 397
C onyenient coal h ouse fo r m in e r s ... *354
Conversion of coal co n su m ers to storage idea, W ooton ... 469
C onverter, R o tary , See “ E q uipm ent, Elec- tr ic a l.” Conveyors. See also “T ra n s p o rta tio n .” — Coal conveyors a t face, *201; L ateral conveyor discharging o nto m ain-line conveyor, *202; L oading c a r ... *203
— L o n g re ta rd in g conveyor, Coal R iv er Colls Co., W. Y a ...*235
— Conveyor system ...*131
— R o ller bearin g s. C onveyor b e lt o p e ra te a on ... *606
— S ectio n al p o rta b le , R ugged all-steel. . . *669
— L o w est co st w ith c o n v e y o r s ... 694
— L o w erin g coal dow n hillside w ith least b re a k a g e ; 0 ’N eale ... *715
— Belt conveyor, Beaded p an co n v ey o r. . . . *717
— R e ta rd in g conveyor ...*718
— Rope an d b u tto n conveyor ... *719
— Long conyeyors cau se excessive b re a k age ...*765
— S team shovel an d conveyor in strip p in g . *837 Coolidge’8 coal p lan k ... 916
C o-operative m a rk e tin g to relieve com peti- tio n ; W ooton ... 695
Copper — Bending o f copper ... 331
— Care in h an d lin g ... 507
— C leating and su p p o rtin g c o p p e r ... 545
— “ Copper sic k n ess,” ... 2 5 4 , 545 — E x p an sio n and c o n tra c tio n , A llow ing fo r 289 — -Tinning stra n d e d co p p er beyond s u p p o rt 402 C orrosion in m ines. See “ W a te r.” Cost — A n ti-fric tio n b e a rin g s lo w er c o s ts ...*603
— C oncreting sh a ft, Cost o f; ta b l e ... 612
— C o-operation of m in ers an d o p erato ra to c u t cost ... 733
— C ost-cutting, Suggestions f o r th e execu- tiv e ; G ealy ...*678
— C ru sh in g and p u ly erizin g p la n t, Cost o f; ta b le ... 700
— C ru sh in g coal f o r m a rk e t, Cost o f . . . . 490
— E stim a te o f m odern equipped p la n t; ta b le s ... 132
— F a c to rs p ro d u cin g w ide ran g ę in cost of p ro d u ctio n ; W ing ... ... 145
— H ow "m in e b a la n c e ” affects c o s ts ... 637
— L ow c o st of p ro d u c tio n vs. h ig h c o st of o p e ra tio n (e) ... 231
— L o w est c o st w ith conveyors ... 694
— M achinę c u ttin g in s tr ip m in e reduces co st ... *415
— M idw est riv e r traffic red u ces co st o f 1 1 1 . coal ... *246
— M iners’ w ages an d co st of co a l; L u b in , B ook rev iew ... 871
— O p eratin g cost inereased b y accid en ts. . 388
— O p erating different f a n drives, p er y e a r; ta b le ... 725
— P o w e r costs, D iverse opinions o f ... 632
— R e la tio n o f c o st o f p ro d u c tio n to p rice o f c o a l ... 4 2 8 — R e p o in tin g m a c h in ę b its ... 4
— S to n e d u s tin g in B ritish m in es; ta b le , 6 6 8 ; U. S ... 700
— T ran sm issio n o f gas b y pip ę line, E s ti m a te of cost ... 951
— U n ifo rm co st acco u n tin g , N a t’l. p a rle y 396 — U pkeep o f lo ad in g m ach in ę p e r ton. Cost o f ... 845
— W ays o f low erin g m ine co sts an d b e tte r- in g coal ... 322
C o u rts. See also ‘‘I n te rs ta te Com m . C om .” — A la. S uprem e C o u rt ru le s consignee to b e a r w eig h t loss ... 337
— C irc u it c o u r t a t W. V a. nolle prossed in d ie tm e n ts ... ... 919
— C leveland & W estern Coal Co. ju d g m e n t sta n d s ... 882
— K eeney, C. F ., tr ia l. 3 9 8 ; A c q u itte d . . . . 468
— R e c a p tu re clau ses, T ra n s p o rta tio n A ct su s ta in e d ... 50
— S trik e r. C om pany m ay ev ict ... 470
— U . S. S u p re m e C o u rt re sto re s allo w an ce fo r b o a rd in g c a r d oors ... 793
C rane C reek m ines, E q u ip m e n t a t ... *763
Page Deep h o le d rillin g b y se c tio n a l r o d s ... *614
D eep w a ter C. & I. Co. b u y s coal la n d in A la ... 468
“ D e la te ste r” ; F lo a t-a n d -s in k te s t f o r c o a l. *772 D e p a rtm e n t o f M ines — W h a t w ould be its f u n c tio n ...(e ) 714 D eterm in in g u n m a rk e ta b le co al in seam ; Owens ... *465
D o cto rin g a sick in d u stry . (e) 3 7 7 ... 818
D oor o n h a u la g e ro ad , S e lf-a c tin g m i n e . . *898
D ragline, B u tle r B ros. 1 8 9 0 ...*799
D ra w sla te does n o t p ro h ib it m ech an ical lo a d in g ... 7 6 8 D r. W heeler e x p la in s w et coal d u s t lia b le to explode. B ro sk y ... *423
D rills and D rilling — D rill f o r c u ttin g la rg e c irc u la r h o le s in sh e e t m eta l ...*482
— D eep-hole d rillin g b y sectio n al r o d s . . . . *614
— E lec. ro ck d rill and h a m m e r ...*518
— E lec. ty p e d rill. G eneral u t i l i t y ... 6 24 — K eeping ro c k d rills f i t ...*221. *253 — " L ittle -G ia n t” d rill m o u n te d on p o rta b le p o st ...*773
4 C O A L A G E Vol. 25
D ry-land d red g e p recedes m o dern s h o v e l... *798
D u st. See also "E x p lo sio n s, M inę,” an d “ R ock D u s tin g .” — A n aly ses o f d u st p ro p a g a tin g ex p lo sio n . 686 — Coal d u st, R a te of d e p o sitio n ; d ia g r a m s . *666 — D an g ers of coal d u st, To cope w ith . . . . 367
— D u st in m in e a ir, N ew sa m p le r in v e n te d 321 — D u st in m ine e x p lo sio n s ...(e) 9 3 4 — D u st m enace in C olorado m in e s. . . . *386
— D u st p re v e n tio n in m in es ... 4 1 8 — E x p e rim e n ta tio n w ith a n im a ls b re a th in g d u st-la d e n a ir ... 322
— E x p e rim e n ta tio n of d u s t d a n g e r ...(e) 519 — H a rm fu l w hen b re a th e d ... 3 50. 417 — In fla m m a b ility d ep en d s on fu e l r a te s . . . 950
— H ydrogen in d u s t cau se of e x p lo sio n . . . 573
— R oad d u s t less d a n g e ro u s b e in g h ig h in a s h ... 686
— R e d u cin g q u a n tity o f d u s t v s. clean in g m in e ...(e) 7 1 3 — R ock d u s t in sh o th o le s lessen s violence an d in c re a se s lu m p coal. H o rlic k . . . 805
— S ilica d u s t n o t a lw ay s e ą u a lly d a n g e ro u s 417 — W et d u s t s till lia b le to explode, *423; W a te r re q u ire d ... 425
E E a rly coal strip p in g fu li o f h e a rtb re a k . H olm es ... *797
E d ito ria ls — A fte r w a itin g six th o u s a n d y e a r s ... 829
— A g ain st th e d ay o f r a i n ... 267
— A irtig h t c o m p a rtm e n ts in th e coal in- d u s try ... 450
— A lex H o w a t is n o t d e a d ... 4 8 4 — Ali so ft-co al m ines a re po w d er m aga- zin es . . ...i ... 3 0 4 — A n excess o f te c h n ic a l m e n ... 829
— A re m o re hom es n e e d e d ? ... 899
— A re y o u a m u d h o r s e ? ... 752
— A re you w a tc h in g fo r cro p fire s ? ... 2
— A t C astle G ate ... 4 5 0 — B ad w o rk n e v e r p a y s ... 555
— B e tte r in sp e c tio n a l fo rc e s ... 2 3 2 — B la c k sheep in good fa m ilie s ... 378
— Can th e u n io n fields c o m p e te ? ... 661
— C an’t w in w ith p o o r c a r d s ... 231
— C losing dow n m in es ... 796
— Coal d u st “ as is ” ... 519
— C om plete m e c h a n iz a tio n ... 196
— “C o n so lid ate.” th e y ery ... 268
— C o nsolidation o r b a n k r u p tc y ... 866
— C onveyor in strip p in g ... 829
— D efinitions ... 162
— D octoring a sick in d u s try ... 377
— D ressed u p an d n o w h ere to g o ... 714
— E conom y in tra n .sp o rta tio n ... 753
— E n erg y o r a tro p h y ... 303
— E v e ry m an h a s h is m e n ta l t w i s t ... 413
— E x a m p le of th e p o w d er c o m p a n ie s. . . . . 933
— F a lle n in th e p it th e y d ig g e d ... 866
— F a u lts and m in in g f r a c tu r e s ... 866
— F in e a n th ra c ite an in tru d e r ... 413
— “F ir s t ro b in ” is sam e r o b i n ... 1
— F o r a new e r a in s a f e ty ... 231
— F ro m th e p a r tic u la r to th e g e n e r a ł. . . . 378
— G e ttin g dow n to re a l b u sin e ss ... 626
— Give th em a b o o st ... 232
— G ive y o u r sh o v e ls a f a ir t r i a l ... 4 1 4 — G uilding th e p u b lic ’s c h o ic e ... 796
— H andcuffed to p reced en t ... .. 900
— H ere if a n y w h ere ... 196
— H oodlum ism ... 3 0 3 — H ow M r. L ew is fa v o rs m a c h in e s ... 161
— H ow n o t to avoid ta x e s ... 625
— Is i t a b s u rd ? ... 795
— I s th is th e w ay a t y o u r m in e ? ... 591
— Is th is w h a t w as m e a n t? ... 125
— I t ’s all in th e f e e d ... 752
— J o b o f gloom , A ... 341
— Jo h n R e x still ru le s ... 268
— J u s t w h a t is th e o u teo m e ... 751
— Keep goodw ill w ith y o u r n e ig h b o r... 829
— Keep m o v in g ... 125
— L a rg e r coal ... 662
— L e sh e r, C. E.. resig n s fro m Coal A g e. . . 33
— L e t th e re b e peace ... 195
— L ig h t is lig h t ... 341
— L ocalism o f c o n su ltin g e n g in e e rs... 4 13 — M ake a scalę In h a s tę and re p e n t a t le isu re ... ... 865
— M aking of a n th r a c ite ... 900
— M a k in g one p ro sp e r w h ere tw o died be- fo re ... 555
— M an to m an ... 161
— M a rv elo u s or only in e v ita b le ? ... 483
— M en w ith th e h o e ... 752
— M issions w o rth s u p p o rtin g ... 713
— M ore g o v e rn m e n t m o nopoly ... 196
— M ore p o w er to h im — and l e s s ... 830
— M r. L ew is, k eep y o u r se a t ... 933
— M uch a t little c o st ... 304
— N a rc o tism ... 126
— N e a r w ay to oil an d c o k e ... 449
— N e g a tiv e m inds ... 829
— N ew p ro b lem s in m e rc h a n d is in g ... 661
— Npw u se o f tra d e a s s o c ia tio n s ... 231
— Off th e tr a c k ... 520
— On th e kemping of good c o m p a n y ... 195
— O u r case likp t.hf* f a rm e r ’s ... 933
— O u r s h a tte re d f a ith in w a t e r ... 414
— O u r la b o r exodu« ... 556
— O u tsid e lo o k in g in ... 752
— Passine: o f thf* h a n d s h o v e l... 126
— P a s s in g th e b u c k ... ... 519
— P re p a.rin g an alib i ... 33
— P ric e s and th e w ag ę c o n tr a c t... 342
— P ric e tre n d fo r y e a r d o w n g ra d e ... *66
— P ro te c tin e ' th e b u y e r ... 2
— P u ttin e- th e eagle on c o a l ... 162
— O uiet b u sin e ss boom re so o n sib le. e tc . . . *65
— R id m in es o f c o n v ict la b o r ... 125
— R ock dusfinsr vs. m in e c le a n in g ... 713
— S afe g as lim its ... 714
— S a fe ty a m a jo r co n s id e ra tio n ... 342
Page E d ito ria ls— C ontinued — S afety a t la s t ... 625
— S ane th in k in g on tr a n s p o r ta tio n ... 1
— S elling coal in k ilo w a tts ... 555
— S h all g as be m ade a t th e m in e s ? ... 933
— S im p lificatio n of sizes ... 830
— Slow p ro g ress in s ta n d a rd iz a tio n ... 520
— S m ali cars, Iow to n n a g e ... 34
— S m ali m ines h a v e a d v a n ta g e s ... 450
— T a lk m ines, n o t p o litic s ... 555
— T ellin g th e w orld ... 591
— T h a t blin d sp o t ... 483
— T he g re a te r force ... 713
— “ T he w o n ’t s ” ... 161
— T hose b ad boys of N ova S c o tia . . . 449
— T hose M a ssa c h u se tts coal te s ts ... 267
— Tim e fo r L ew is to r e tire ... 556
— T im e fo r new law s ... 899
— Too m an y grocery s t o r e s ... 626
— Too m u ch m in e ... 661
— U nion an d no n -u n io n te rrito ry ... 625
— U nion will learn , T h e ... 303
— W age s ta n d a rd iz a tio n ... 865
— Walking- a ro u n d th e b ło c k ... 662
— We an d th e y ... 341
— We h a v e som e h ero es ... 378
— W h a t a b o u t w estern K e n tu c k y ? ... 484
— W h a t h a s h ap p en ed to o u r coal d u s t? . . . 934
— W hen th e w rench fell ... 795
— W here is th e n a tio n a liz a tio n n o ise ? . . . . 753
— W ho w ill u rg e a S ecretary o f M ines ?. . . 33
— W hy? ... 661
— W hy leave field to co n tro l p o w er com p an ies? ... 591
— W hy n o t te le p h o n e ? ... 1
— W hy sh o u ld th e y c o m p la in ? ... 592
— W hy w o rk in th e d a rk ? ... 752
— W onder w h a t F a rrin g to n th in k s a b o u t. . 519
— W rong kin d of p u b lic ity ... 899
— Y ou c a n ’t p lease everybody ... 865
— Y o u r place in C in cin n ati ... 484
E d u c a tio n an d T ra in in g — E d u c a tio n , O v er-ratin g th e v a lu e o f . . . . 4 5 8 — T ra in in g and e d u catio n in accident pre- y en tio n ... ._. . . *528
Efficiency in a depressed m a r k e t ... f ( e ) 752 Efficiency in o p e ra tio n ... (e) 795 E le c tric a l en g in eers d iscuss w ays o f sa v in g p ow er to c u t m in in g c o s ts ... *754
E le c tric ity — A lte rn a tin g c u rre n ts n o t ra te d by m axi- m a ... 949
— D ry b a tte ry , in b la stin g , a m e n a c e ... 184
— E le c tric c u rre n t ex p lain ed b y v e n tila tio n a n alo g y ... 784
— E lec. e q u iv a le n ts o f 1 lb. w a t e r ... 183
— E le c tric a l te rm s, E x p la n a tio n of fa n in . *53 — H a z a rd s in elec. in s ta lla tio n s ... 570
— In d ic a tin g in stru m e n ts, d.c. and a .c ... 482
— In s u la tio n fo r m ine h a n g e rs, Composi- tio n o f ... 439
— M a k in g a p p lic a tio n o f e le c tric ity safe. Ilsley ...*569
— Oil c irc u it b re a k e r, N ew a u to m a tic ...*448
— R enew al o f fu se s on tr a n s fo rm e r cir- e u its m ade sa fe r ... *439
— S afety fu ses in electrical m a c h in e s ... 949
— S tra y c u rre n ts d e to n a tin g explosives, P re v e n tin g ... *239
— S tra y c u rre n ts in m in es ... 814
— S u rg e s m a k e a lte rn a tin g c u rre n t d a n g e ro u s 948
— T h a w fro z e n w a te r pipes by e le c tric ity . *438 — T e stin g fo r elec. c h a r g e ... 183
— W a tt e q u iv a le n t8; Jo u le eq u iv alen ts. . . . 149
— W hen is e le c tric ity sa fe ? ... 565
E le c tric la m p s — M a xim um life , U se r ig h t y o ltag e to g e t.* 7 4 0 E lec. M achinery, O p eratin g . See also “ E q u ip m e n t, E le c .” — A u to m a tic reclo sin g c irc u it b r e a k e r . . . . *220
— B reakdow ns, To m in im ize ... 5
— C leaning in su la tio n fro m copper coils. . . 473
— C ontrol of s u b s ta tio n s fro m s u r f a c e . . . . *595
— “ Copper sick n ess” ... 2 5 4 — D an g er in Iow y o lta g e tra n s fo rm e r. . . . *148
— D efective rh e o s ta t cau ses arcin g ... 4 2 0 — D eyeloping in d u c tio n an d sy n c h ro n o u s m o to r ... *141
— D ynam os and f a ilu re to e x c ite ... 366
— F a ilu re of m ach in ę to o p erate pro p erly o fte n due to m an ... 544
— H e a tin g of c o n d u c to rs; In sta llin g s h a ft cables, 2 2 : Use fiber-duct ... 254
— H ook stic k m ak es fu sin g s a f e ... *623
— H ow to g ro u n d elec. m in in g m a c h in e ry . . 947
— Ig n itio n o f g as b y m o to rs and C o n tro ls. . 424
— I n s u la tin g v a rn ish e s, N a tu rę of, 221. 2 5 4 : T e sts ... 330
— Keep lo co m o tiv e a rm a tu rę b e a rin g s cleań 581 — K eeping reco rd o f p erfo rm a n c e (e) . . . . 752
— L a rry -c a r service, M otors fo r ...*237
— M a k in g elec. e q u ip m e n t sa fe to u se . . . .* 9 2 1 — M e ter a c c u ra c y affected by Iow p ow er f a c to r ... 854
— M o to r-g e n e ra to r se ts in s u b s ta tio n s con- tro lle d fro m “ s u r f a c e ” ...*59 3 — M o to r-g en erato r se t n o t grounded . *149. *182 — M o to r-g en erato r sets, undere-round . . . . *344
— M ultiple-speed fa n m o to r, S lo w in g ... 7 55 — P ro te c tin g m o to r g e n e ra to rs and ro ta ry c o n v e rte rs ... 544
— P u t v o ltm e te rs to w o rk ... . 759
— R a ił b o n d in g to fu li c a p a c ity . *331 — R e n a ir o f m ach in es pays, * 1 7 2 : Rock _ d r i !* ... : --- „...*2 2 1, *253 — K eq u irem en ts in sa fe o p e ra tio n ... 948
— R o ta ry co n v e rte rs, S to p p in g flash-overś on ... 702
— S a fe ty -fu se b o x su e e e ssfu l ... ! ! ! ’ *54 5 — S en tio n alizin g ta p s , E a sy m eth o d of m ak- mer ... *649
— S p a r k in r C auses o f ... . 6 16 — sta n d ard izin g - m o to r speeds ... 758
— S to ra g e b a tte rie s , A u to m a tic c h a rg iń g o f ... ... 680
Page P ag e Elec. M ach in ery , O p eratin g . See also “ E q u ip - m e n t, E le c.”— C ontinued — To keep e q u ip m en t in good c o n d itio n . . *843 — V o ltag e in com m on u se ... 343
— W atch f o r b reak d o w n s b efo re th ey affect p u rse ... 758
E le c tric P la n ts and S ta tio n s — A u to m a tic s u b s ta tio n eq u ip m en t, O pera tio n and co n tro l. L ic h te n b e rg ...*912
— Coal consum ed and pow er g e n e ra te d . . . , 541
— Coal p ie r electrically o p erated ... *48
— E lec. h o ist, P a c k e r N o. 2 slope, S henan- doah. P a ... *35
— F la sh in g o f s u b s ta tio n g e n e ra to r stopped b y choke .coil ...*887
— 'H igh-yoltage tr a n sfo rm e r s u b s ta tio n . . . *632
— In sid e pow er sta tio n ... *678
— Iso lated vs. ce n tra l p ow er p la n ts (e) . . . 196
— 'L ight and pow er p la n t, 110 v o l t ... *302
— M ine p o w er p la n t, C heap p o w er b y ...*210
— M o to r-g en erato r se ts in tw o s u b s ta tio n s o p erated in p a rallel. W a g n e r...*593
— Poles. D im ensions of W estern red ced ar; „ ta b le ... 290
— P ro te c tiy e a p p a r a tu s f o r s u b s ta tio n e q u ip m en t ... *701
— Sm ali lig h t and po w er p la n t ...*659
— S u b sta tio n a t load ce n te r u n d e rg ro u n d . . *757
—-V e n tila tio n of u n d erg ro u n d s u b s ta tio n s * 2 1 E q u ip m en t, A ir — A ir co n tro l fo r coal and ro ck d u m p s. . . .* 5 2 6 — A ir cooler su ite d fo r turbo-elec. g en era to rs ... 432
— A ir d rill f o r generał use, 3 -cyiinder * m o to r ... *750
— A ir h a m m e r f o r riv e tin g . . . *. *32
— New m odel a ir h o ist ... . . . *230
— A ir-sw ept m ili fo r p u lv e riz in g c o a l. . . . . *32
— A ir-tab le cleaning, T h eo ry and p ractice. A rm s ... — D rill an d re a m e r ... *376
— H ig h -p ressu re a ir blow er ... .. *518
— R e cording ste a m an d air-flow m e t e r s .. *968
— U n it ty p e a ir h e a te r ... * 5 1 3 E q u ip m e n t, E le c tric a l. See also* “ E lec. Ma- chm ery. O p e ra tin g ,” “T ra n s fo rm e rs,” W elding.” — A u to m a tic m ine e q u ip m e n t, E lec. engrs. d isc u ss ... 286
— A u to m a tic sw itc h b o a rd c o n tro is pow er d ie trib u tio n ... * 2 1 1 — A u x ilia ry fa n m o t o r ... ! ! ! ! ! ! ’. *345
— A u x ilia ry re la y f o r lo n g tim e-lim it śerv- !ce ... *340
'— S leS; v^ Jve e rin d e r, L ig h t w eigrht' ! ! > 1 6 0 hj. M. B. re sista n c e n ow o b ta in a b le ... *266
— L o w -rate b a tte r y c h a rg e r ... *302
— S w itch b o ard rec o rd in g in stru m e n t, P o rt- ab le . ...* 19 4 T rolley w ire, P ro p o sed sp e d fic a tio n s f o r 366 — R esistan c e grids, D am age r e su lts from h a s ty re p a irs to ...*401
— E lec-pow er tra n sm issio n lin e . ... 401
— P u m p m o to r ...*4 J_2 — F a i r . t r i a l f o r new e q u ip m en t ( e j . . . ’ 4 14 —JElec. c a p s ta n c a r p u l l e r ... * . *448
Oil c irc u it b re a k e r, N ew a u to m a tic . *448 — P oles, C ircu m feren c e o f c h e s tn u t: ta b le 4 7 3 — Jijlec. p o w e r t r a m m e r s ... *482
— § lec- d rill and h am m ers . . ! *518
§ r ° undil?S clam p fo r co n d u it S y stem s. . *518
— t r ans f er rack , C heap and efficient.*544 —^B ell-nngm g b a tte r y flo ats on a u to m a tic c h a r g e n ... — S afety -fu se box s u e e e s s f u l ... [ ’ *545
C u rre n t re la y an d self-co n tain ed a m m e te r.*5 5 3 — i? Iow m e te r f o r gas o r liquid, E le c tric a lly o p erated ...* 5 5 4 — E lec screw d riy e r and so c k e t-w re n ć h ! ! ! *554 In su la tio n resistan ce. In s tr u m e n t f o r m e a s u n n g ... *554
— S w itchroom fo r co n tro l of cirć u iiś! . * 5 7 1 — <Cam-type co n tro lle rs, C are and a d ju st- m e n f c ...*580
inclosed g rin d er fo r m ine s h o p s . .* 5 8 9 M eters f o r sw itc h b o a rd u se . *604 — R u b b e r jack eted . p o rta b le c a b le . . ' . ! ! ! ! 623 E x p an sio n ta n k fo r larg e c a p a c ity t r a n s fo rm e rs ... ... — J y p e drill, G eneral u t i l i t y ... ! . ! ! 624
— B e tte r eq u ip m e n t lo w ers cost . . 679
— P re ssu re -c o n tro l re la y ...' ! ! ! *712
A u to m a tic lim it sw itc h fo r e le c tric h o is t *712 — M o to r f o r d riv in g fa n a t v a ria b le speed, isest ty p e : C h a d b o u rn e ... *722
'Single a n d 3 -p h a se m o to rs, N ew lv de- yeloped ... .. *749
? ^ 1y^ h a s e d u e t i on m o to r, C a st r o to r o f.* 7 5 0 iliy d o n o g ra p h ’ reco rd s a b n o rm a l y o lta g e su rg e s ... *816
— -Relay in d ic a te s c u rre n t flow ing iń lin e! *864 — C opper-plated carb o n b r u sh e s n o t nec- essary ... 888
T e m p e ra tu re relay s h e a ts in sam e ra tio a s m o to r ... *898
— M o to r prenerator set, A u to m a tić a lly o p erated ... * 9 14 — IR otary c o n v e rto r o u tf it ... .. *914
— E lec. m in e la m p s red u ce fire h a z a rd i ' ! ’ *92] — ^Phasmgr o u t a c o n v e rte r ...*922
— I:’(' r(,e r WJ ,T hang-er f o r m in e s e rv ic e . . . *922
— 5,w i‘ch sy n c h ro n o u s m o to r. . . . *93J — P ro te c te d m o to r h e a rin p s , N ew ty p e s *946 — K eeps c o n tro lle r fing-ers a n d se g m en ts fro m b u rm n g ...*957
— T ru c k -m o u n te d e le c tric w eld in g o u t f i t ! '* 9 6 8 — Arc-weldiner o u tf it ... «qfio E flu ip m en t. S team — H iph-speed flex ib le c o u p lin g f o r tu rb in ę d riv e s ... 7*230 — S team tu ijin e -g re n e ra to r lip h tin g u n i t . . ' *376
ą ie a m -tu rb in e p la n t, S w itc h b o a rd f o r . . . *631
u n it. M o tor-driven ..."*864 d ’ ,m e te r w ith new in te g r a tin g u n it 932 — R e c o rd in e m eters, Im p ro v e d ste a m and a ir-n o w ... *968
January-JTune, 1924 C O A L A G E 5
P a ge Page
E very b o d y ’s b u sin e ss ... 357
E xplosions, Mine — Kock d u s t b a rrie rs a p re v e n tiv e ... 48
— F ro n tie r mine, Wyo.; B arricade saves lives ... *150
— M cClintock m ine, Johnson City, 111., J a n . 25 ...180, 219 — L an cash ire m ine, No. 18, S h anktow n, Pa., Ja n . 20 ...181, 248, *285 — Study ot p h en o m en ta in E u ro p ę ... 203
— R ock d u stin g to p rev en t, 3 5 0 ; Need a t C a stleg ate (e ) ... 450
— C a stleg ate, U tah, M ine No. 2 . .3 9 5 , *431, 503 — W a te r as a p rev en tiv e of m ine explo- sions (e) ... ... 414
— S h an k to w n , P a ., L a n c a sh ire No. 18 m in e .*419 — Six explosions cau se 129 d e a th s ... 420
— Im p o rta n t d a ta ... 424
— Y u k o n -P o cah o n tas Coal Co., No. 2 Mine, Y ukon, W. V a ... 502, 539 — H ydrogen co n ten t in coal d u si a cau se. 573 — Y u k o n explosions, R e p o rt of co ro n er’s ju ry ... 578
— 'R ock d u stin g to p re v e n t e x p lo sio n s. . . . 608
— M jnim iaing an d lo c alizin g explosions; H olm an ... *627
— Phelps-D odge Corp., E ffo rts to p rev en t explo sio n s ... *627
— P ercen tag e due to explosives ... 632
— Benw ood m ine explosion, W heeling Steel C o rp ... 645
— Stone d u stin g as prev en tiv e ...*663
— Open lig h ts cause explosions and fires. . 675
— Chd Ben Coal Corp., Mine N o. 11, C h risto p h er, 111... 685
— (Panel system localizes ex p lo sio n s... 687
— Benw ood m ine, N in ety -th ree bodies recovered ... 697
— Benw ood explosion show s need o f u n i fo rm law s ...*728
— Benw ood b la s t d u e to gas an d d u st ig n itio n by open lam p ... *730
— iKeeping m ines free fro m explosions; Cost, e tc ... 769
— P eabody p ic tu re film show s m ine ex- plosion ... 844
— 'Glen Alden m ine explo., Tw o investiga- tio n s of ... 885
— R ock d u st extin g u ish ed seven explosions.*907 — B arrag es vs. co atin g system ... 907
— Increase in n u m b er of explosions (e) . . . 934
— R em oved v e n tila tin g tubes, G artshore m ine (G rt. B rita in ) ; explosion follow ed. 944 E xplosives See also “ B lastin g ” — D ynam ite ex erts equal force in all d irections ... 23
— L iq u id oxygen dan g ero u s in m in e s... 45
— iStray c u rre n ts d e to n a tin g explosives, P re v e n tin g ... *239
— Q u an tity reduced 25 p e r cent by use of perm issibles ... 321
— P erm issible explosives reduce c o s t... 382
— B lack pow der vs. p e rm issib le s... 382
— L ow -freezing. 40-per cen t dynam ite . . . . 412
— W eight of single ch arg e in G rt. B rita in . . 426
— Gases produced, B u reau o f Mine stu d y . . 536
— P e rc e n ta g e of accidents in use; in trans- p o rta tio n ; from suffocation by fu m es. . 632
—‘P erm issib les lessen fa ta litie s, d iag ram ; Slow pow der fo r b r ittle c o a l... 646
— P o u n d s of perm issibles used p er to n of coal m ined, d ia g r a m ... 647
— P erm issib le explosives recom m ended. . . 807
— A buse of explosives— W. Va. In s t. paper. 814 — B ritish ru les fo r locating m ag azin es. . . . 839
— P erm issib les vs. b lack pow der, Dis- cussion ... 943
F a n s and B low ers See also “ V e n tila tio n ” — Elec. fan s, D angers in s t a r t i n g ... 16
— E x p la n a tio n of fa n in e lectrical te rm s . . *53
— R e su lts o f n u m ero u s fa n te s tp ... 53
— H ig h -p ressu re a ir b lo w e r ... *318
—<Auxiliary fa n m o t o r ... *345
— F o rced d ra ft. T h eo ry an d p ra c tic e ... 352
— C oncrete fa n h o u s e ...*562
— F a n m o to r lo w ers c o st ...*679
— 'Blower m o u n ted on tr u c k fo r sto n e d u stin g ... *685
— M o to r fo r d riv in g fa n v a ria b le speed, Best ty p e ... *722
— C h a ra c te ristic cu rv es typical m ine f a n s . *723 — Cost o p e ra tin g diff. driv es p er y ear; ta b le ... 725
— Slow ing m o to r to save p o w e r... 755
— T e stin g th e fan . D on’t o m it ... 760
— F a n -m o to r s ta rte r , Q uick re p a ir t o ... *817
— F a n w ith h e a tin g u n it ...*863
— 'F an n o t idle w hen. pow er is a v a ila b le . . .* 9 2 1 F a rm e rs dem oralized b y cro p sh o rta g e s ( e ) . 9 3 3 F a rrin g to n u rg es co-o p eratio n of m inera and o p e ra to ra ... 733
F a ta litie s . See also “ A ccidents” — Coal-m ine accidents in M a rch ; t a b l e ... 643
— P erm issib le s lessen fa ta litie s ; d ia g ra m . . .* 6 4 6 — Open lig h ts. D ue to ... 6 7 5 — F ra n k lin C ounty, 111.. P e rc e n ta g e s all c a u se s: ta b le ... 6 85 F irebosses — E x am in e d in presence of gas ... 24
— M any firebosses fa il to d etect 3 % o f gas. 24 F ire s, Mine — Crop fires. w a tc h f o r (e) ... 2
— B itn e r fire. S u m m it H ill an d Red A sh fires c o stly ( e ) ... 2
— V e n tila te fire a re a w ith in e rt g a s ... 55
— I n e rt gases in fig h tin g m ine fires. Rela- tiv e v a lu e o f ... 2 4 3 — P ro te c tio n b y stow ing, b y v e n tila tio n , or b y sto p p in g s ... 291
— F ire pu m p , ap p ro v ed sin g le-sta g e ... *340
— A lden m ine. S ealin g off fira i n ... *379
— A n aly ses o f r e tu rn a ir fro m fire; ta b le s . 3 8 2 Fires, Mine— Continued — F ire largely lso lated by f a u lt, successfully sealed ... *379
— O xidation o l p y rite o r o f coal cause of five ... 509
— P er c en t oxygen in re tu rn a i r ... 640
— Open lig h ts cause of fires ... 675
F irs i Am 2>~e aiso “ Mine Rescue — Seventh in te r n a t’l c o n t e s t ... 52, 397 — In te rn a tio n a l m eet p o stp o n e d ... 698
F lam e cap s used fo r te stin g fo r gas over 100 y r s ... 536
F lu sh in g old w orkings ... *356
F o rd in g th ro u g h a m ine e n try in W yom ing.*862 F o rd so n tr a c to r eąu ip p ed w ith s h o v e l...*590
F ra n ce — R ock-dust b a rrie rs c o m p u lso ry ... 48
— Coke s itu a tio n m ain fe a tu rc of fu e l problem ... 105
— .O perators aid m in ers a n d re p a ir p la n ts .* 2 5 6 — M echanizing coal m i n e s ... 349
— Coal o u tp u t n e a r pre-w a r le v e l... 611
F ra n k lin Coal Co. c h arg ed w ith u n fa ir m eth o d s ... . ... ; ... 882
F re ezin g process to sin k s h a fts in N o rth B elgium ; B iąu e t ...*831
F re ig h t R a te s See also “ R a ilro a d s,” “ I n te r sta te Comm. Com .” — H ig h er N . Y. ra te s ...29, 1 22, 191 — 'New coal ra te s in A la b a m a ... 61
— N o rth w e st ra te s, No a d ju s tm e n t o f . . . . 81
— Coal fre ig h t-ra te decisions ... *85
— New E n gland vs. coal r a te s ; Buffalo to M inneapolis ... 157
— In d ia n a m ines get low er r a t e s ... 227
— Illin o is, Coal ra te s c u t in ... 263
— E x p o rt coal, L ow er ra te s ... 263
— New fre ig h t record, 1923, all ro a d s. . . . 299
— iConsolidation to assist r a te c u t ... 577
— I n d ia n a ra te -c u t p o stp o n e m e n t... 589
— N ew ra te w a r in N o rth w e st ... 623
— iRates fo r all tid e w a te r coal n o t su b je ct to Sec. 28 ... 650
— N o rth w e st hard-coal ra te s fa v o r d o ck s. 659 — V irginian to D eepw ater, T h ro u g h r a t e . . 711
— New f re ig h t ra te s benefit S o u th w e st. . . . 780
— B uffalo-T w in Cities ra te b o o st effectiye Ju ly 1 ... 863
— T ru n k L ine h earin g s on proposed ad- vance in ra te s ... 897
— Five-cent c u t in coal ra te s on Chesapeake & Ohio ... 897
— In d ia n a ra te c u t deferred ... 931
— N o rth w e st r a te changes delayed a m o n th . 956 F u el — Econom y in u se of fuel, E ngineers stu d y . 136 — C onsum ers’ econom ies, Hood ... 145
F u rn ace, C om bustion in — E ffect of Iow a rch *389; R aising fro n t arch *391; R e ar arch *394; E ffect of air pressure, *390; a ir je t and p a rti- tion, *391; S team je t ... *392, 393 — F u sib ility of coal ash , index o f clink- erin g ... 401
— S to k er Controls fu el bed, h o p p e r to a s h p it ... *750
— M uch h e a t w asted in fu rn a c e w a lls. . . . 871
G •Gases — O rsat m achinę, T esting flue gases w ith . 22 — N a tu ra l gas, C onsum ption and p ro d u ctio n 7 2 — In e rt gases in fig h tin g m ine fires, Y alu e of ... 243
— Ig n itio n of gas b y sp a rk s fro m fallin g ro c k s ... 293
— Gas in d icato r, to rep lace flam e sa fety la m p ... 403
—‘Self-rescuer device p ro v id in g escape from G as ... 420, 640 — F ire la m p explosion slow er th a n coal d u st. 423 — Ig n itio n o f firedam p, M eans of ... 424
— M ethane an d a ir, E x p lo siv e lim its and o th e r d a ta , W h e e le r... 489
— H ydrogen an d a ir, E x p lo siv e lim its w ider th a n m e e th a n e ... 490
— E a rly te stin g fo r gas in m in e s... 636
— G ases p ro duced by ex p lo sio n o f p o w d er. 536 — P ro d u c tio n of n a tu r a l gas; d i a g r a m . . . . *563
— Ig n itio n b y s p a rk s ; d iscussion ... 565
— H ydrogen in coal ... 573
— Oxyen in r e tu rn a ir fro m m ine f i r e. . . . 640
— S afety lam p w ill b u r n in fafcal a tm o sp h e re 640 — Open door, G as a c cu m u lates f r o m ... 686
— S afe gas lim its— W heeler vs. W a lk e r ( e ). 714 — G as an a c tiv e riv a l o f a n th ra c ite ; C a rp e n te r ... 7 6 6 — T ran sm issio n o f g a s b y pipę lines, (e) 7 95, (e ) ... 933
— -Should B uffalo’s g as b e m ad e a t th e coal m ines? ... 951
G as M asks, Use of, in m i n e s ... 640
Geology an d P ro s p e c tin g —-C ross-section M a m m o th an d B uck M t. v e in s ... *36
— W a n ts a re due to ero sio n ... 151
— A p p raisin g coal, Geology in ( e ) ... 4 13 — R oof fa lls m ore fre q u e n t a t n i g h t ... 4 6 4 — U n m a rk e ta b le coal in seam , D eterm in in g .* 4 6 5 — S o u th W ales, F olded coal seam s lik e P e n n ... 4 6 6 — Beckley coal bed, W . V a., L im itatiu i.* and ecc e n tric itie s; S ta h l ... *485
— S u rfa c e b re a k s, E x te n t b ey o n d e x cav a te d a re a ...*543
— Deep hole d rillin g b y sectio n al ro d s . . . .* 6 1 4 — D ircctio n o f f ra c tu r e re f a u lts , (e) . . . . 866
G eological S u rvey, U. S. — Y a m p a coal field. Colo., R e p o rt of 10. 4 8 ... 138
— R e p o rt on coal s t o c k s ... 19
— T o p o g ra p h ic m ap s r e ą u e s te d ... 209
— C oal re so u rc e s in C larion Co., P a ... 573
G eo rg ia —-Coal, C lass o f . ... 171
G erm any — Seeks way o u t of R u h r p ro b le m ... *107
— Coal reserv es lo st as re su lt of w ar; ta b le .*107 — Im p o rts of co al; tab le, 1 0 8 ; N a tio n s’ e x p o rts, tab le ... 109
— U unsual h o istin g h e a d fra m e ... ^*130
— C oal reserves ... 17
— Im p o rts affected by p o litical s itu a tio n . . 225
— R u h r coal o u tp u t. L o c k o u t c u t s ... 738
— S tinnes fu n e ra l ... 578
— R u h r coal m iners reje c t m e d ia tio n ... 814
— R u h r coal strik e se ttled ... 849
— S trik e in G erm an m ines u n p ro fitab le to w orkers ... 953
— P ro d u c tio n , Im p o rts, exports, consum p tion of coal ... . 953
Get co m p eten t engineer etc.; K n ig h t... 615
•Glen Alden Coal Co. — F o u r m ines flooded ... 576
— U n w aterin g th e m ines by p u m p s ... *635
— E x p lo sio n k ills 14 m en; Tw o investi- g atio n s ... 885
— S trik e collapses ... 696
G overnm ent eon tro i of coal in d u stry , 736, 737 G overnm ent to ow n n a tu ra l resources, B er ger w a n ts 848
G ra ft in b u sin e ss ... 497
Greased m o u th can n o t say “N o” ... 497
G rease-gun lu b ric a tio n of c a r s ...*854
G reat B ritain — M achinę m ining, Coal c u tters, to n n a g e . 14 — Coal E xchanges assist sales ... 15
— N a tio n al wage agreem ent, 43, 56; R ice. 145 — E arn in g s of m iners in v a rio u s d istricts, T able ... 44
— P riv a te cars em ployed in So. W ales. . . . 47
R ock-dust b a rrie rs co m p u lso ry ... 48
— B ritish tra d e u n se ttle d ... *104
— L a b o r p ro g ram , ( e ) ... 162
— P ro d u c tio n p er m a n -sh ift; ta b le ... 252
— R a p id strid e s in coal tr a d e ...: • • • ^ 8 2 —-Shaking c h u te s to convey coal u p h i l l . . 354
— A nim al h a u la g e vs. lo c o m o tiv e s... 382
— S tone d u stin g vs. sp ray in g p r a c tic e ... 425
— W eight of single c h a rg e in b la s tin g . . . . 426
— Coal-m ine accidents ... 427
— M iners reje c t 1 0 ; ask 20 per cent in- crease ... 433
— S afety e x p e rt stu d ies coal in d u stry h ere. 434 — A p p o in ted L o rd H igh C om ’r, Ja m e s B row n, ... 4 3 5 , *542 — W ash er tre a ts m ixed coals of w idely y a ry in g c h a ra c te r ...*455
— M ine law s described; H ow diff er fro m U. S. la w s ... 462
— M ine p ra c tic e com pared w ith A m erican . 462 — S o u th W ales coal seam s folded like P e n n . 466 — G aseous m ine defined in law ... 490
— M iners re je c t o p e ra to rs’ offer ... 577
— B all-b earin g m ine cars. E n g la n d investi- g a te s ... • ... 605
— 'B ritish E m p ire ex h ib itio n , Coal m ine a t.* 7 3 5 — H ouse of Com m ons re fu se s to n a tio n a liz e m ines ... 779
— H ow m ines diff e r fro m o u rs ... 769
— L a w s in B rita in re g u la te h a n d lin g la m p . 806 — W em bley ex p o sitio n , Coal-minf- m odel a t.* 8 1 5 — B ritish ru le s fo r lo c a tin g m a g a z in e s. . . . 839
— W elsh a n th ra c ite seeks C anada m a r k e t. 882 — b r i ti s h also ta k in g sto c k o f re so u rc e s. . 942
— G a rtsh o re m ine explosion ... 944
G rease-gun, A lem ite h ig h p r e s s u re ...*711
G rinding and p o lishing w heels, How select and use ... *2 2 ? G row th of W. V a. coal fields ... 609
•G uaranteed c o n tra c t u rg ed to re sto re con- fidence; W ooton ... 601
G unite — T est in explosion a t B ruceton m in e ... 56
H H au lag e. M ine. See a lso “L ocom otive, M ine” 490 — Sm ali c a rs lim it to n n ag e in B ritish m ines, (e) ... 34
— T ro lley w ires excluded fro m B ritish m iitós ... 4 2 — D rop -b o tto m cars. C apacity and construc- tio n of ... 56
— T rolley clam p, B ulldog ...*160
— Section in su la to r sw itch *230; L ocking ty p e ... — E le v ated tr a c k aids r e p a ir of m ine c a r s . *254 — Com bined conveyors an d cars, v s. all- conveyor system ... 322
— R a ił b o n d in g to fu li c ap ac ity ... *331
— M ule c o llar, H e a lin g ...• . • • • • . ... *340
— T ro lley w ire, P ro p o se d sp e cificatio n s . . 366
— W reek s in m in es d im in ish p ro flts (e) . . . .5 2 0 — T ra c k tie in one piece ... *590
— P o o r b o n d in g o f ra ils cau ses w a ste of p o w er (e) ... .. • • • 591
T ro lley w ires excluded fro m B ritish m in es. 42 T ro lle y clam p , B u lld o g ... *160
R a ił bon d in g to fu li c a p a c ity ... *331
p o w er (e) ...#... 691
R a ił b o n d in g to fu li c a p a c ity ... 331
M ule collar, H ealing ... 340
— S elf-rescuer device p ro v id in g escape fro m — F ire d a m p explosion slow er th a n coal d u s t. 4 23 — L o co m o tiv e req u ired , W eight o f ... 638
— A shley p la n e s li f t co al a t Iow c o st . . .. * 6 4 9 — P o rta b le c o n v ey o r c o -o rd in ates m in in g an d h a u la g e ... *669
M a tch tro lley -w h eel grooves to o v erh ead fittin g s ... ™JL — M o n ito rs, g u n b o a ts ... 7 10 — R e ra ile r t h a t h o ld s its e lf firm ly in posi- tio n ...*897
— S elf-actin g m ine do o r on h a u la g e r o a d . .* 8 9 8 — E ą u ip m e n t a t I n d ia n m ines— m odern. *943; p rim itiv e ... .. — C ost re d u c e d b y m in o r c h a n g e s in^ lo co m o tiv e ... 967
JPage
