McGRAW-HILL PUBLISHING COMPANY, INC.
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NEW YORK
W ith Which is Consolidated “ The Colliery Engineer” and “ M ines and M inerals”
DEVOTED TO THE OPERATING, TECHNICAL AND BUSINESS PROBLEMS OF THE
COAL-MINING INDUSTRY
VOLUME XXXI
January 1 to June 30, 1927
ISSUED WEEKLY
P 3 °? 5 / n / I
COAL AG
W ith W hich is Consolidated
T h e "C olliery E n g in e e r' an d "M in es and M in e ra ls ’
IN D EX TO VOLUME XXXI
Ja n u a ry F tin Ju n e 30, 1927
NOTE— T h e a rtic le s and referen ces in th is in d ex h a v e been classified under leading1 s u b je c ts o r topics, as f a r as p racticab le, and should be s o u g h t u n d e r such heads, w h ich to g e th e r w ith all unclassified m a tte r are a rra n g e d a lp h a b e tic ally . Illu s tr a te d artic le s o r c u ts s tan d in g b y th em selv es a re indicated by a n a ste risk ( • ) . All e d ito ria ls a p p e a r u n d e r t h a t su b jec t, each h a v in g its ex act title . E lsew h ere th e su b ject m a tte r of an e d ito rial w ill be fo u n d classified a n d m ark ed ( e ) . M any title s of a rtic le s are a b b re v ia ted , th e aim b ein g to give prom inence to im p o rta n t w ords. B ook rev iew s a re in
d ic a ted bv ( f ) . . . .
F o llo w in g is a lis t o f th e pages included in each issue of th e volum e, to g e th e r w ith date and n u m b e r o f the issue, fo r convenience of re fe re n c e: v
N o. P p .
Jan . 0 1 1 - 3 4
13 2 ... 35- 08
20 3 09-103
27 4 103-182
F eb . 3 5 183-210
10 0 217-250
17 7 251-284
24 8 285-318
M ar. 3 9 319-352
10 10 353-380
17 11... 387-420 24 12 ... 421-454
31 13 455-488
A pr. 7 14 489-523
14 15 523-550
“ 21 16 5 5 7-590
28 17 ... 591-020
M ay 5 18 027-000
12 19 ...061-710 19 20 ... 717-750 2 6 2 1 ... 751-800
J u n e 2 22 801-834
9 2 3 ... 835-808 10 24 ... 809-902
» 23 2 5 903-938
A P ag e
A ccid en ts; See also “ F a ta litie s ”
— Does season affect accid en t r a te in coal
m ines? R ead ... *355
— Eye hi ju ries fa ll 00 p er c e n t ... 043
— R o o f fa lls (e ) ... 450
A ccounting. E v o lu tio n o f o v erh ead ... 475
A cco u n tin g aid in p ro fita b le o p e ra tio n . Cost 918 A dvancem ent, q u a lific a tio n s fo r. H u tc h in g s 840 A d v e rtisin g m ak es b u sin ess increase. T rade a sso c iatio n ... 393
A e ria l tra m w a y fo r re fu se c a r ...*008
A erial tra m w a y opens u p m a r k e t s ... *491
A frica — P ro d u c tio n , coal ... 477
A ge o f psychology fo llow t h a t o f steel . . . 408
Alabama — C onvict la b o r in m ines 90. 109. 20 5 . 3 0 7 . 858 — F ir s t aid ... ■ 307
— M obile dock ... 858
— P rice s a t B irm in g h am ran g e coal ... 109
— P ro d u ctio n ... 7 8 9 — R eview , m i n i n g ... 149
— R eview . 192 0 . M cL aurine ... 108
A la sk a — R eview , m ining ... 153
A m erica n F ed era tio n * & t... 22
A m m onia, M ont-C enis process . . . ... 929
A nalyses, S o u th A frican coal ... 0 0 3 A n th ra c ite — A n th ra c ite Coal Service ... 3 2 0 — B u ck w h e a t firing ... 4 2 0 — B u ck w h e a t sh ip m e n ts increase ... 439
— Cargo c o al sh ip p ed fro m L a k e E rie p o rts 057 — F u tu r e success re sts on engineering and m e rch an d isin g . W a rrin e r ... 107
— Je s su p p la n fo r fu ll tim e ... 445
— L a b o r h isto ry , early . E dm onds *11. *43. •7 5 . *189 — M ass. la w fixes h a rd coal sizes ... 80
— P en n , a n th ra c ite bloc ... 241
— Prices, c irc u la r. N ew Y o rk 21 2 1 3 372. , „ , 477. 048. 747. 850 — P ric e s fo r 1 4 y r s ... *157
— P rices New Y o rk m a rk e t 1 9 2 6 . . ... 167
— P ro d u ctio n . P e n n ... 048
— R ate c u t to n o rth e rn N. Y. o rdered . . . 372
— Screening. T ren d s in . D uck ...*259
— S h ip m en ts fro m B uffalo to u p p e r lak es 58 — S trik e d ue to L i n d b e r g h . , . . 920
— Sizes, s ta n d a rd ... 259
— T ax . P en n 34 3 4 7 3 ' 5 3 9 , 786 — T axes, coal com panies ... 107 34 3 — W ashing p la n ts and ad d itio n s 1920 130 A rch tile. F le x ib le ... . *937
A risto tle, say s G andy, F o llo w . . ! ! ! ! * ! ] ! 843
Arkansas^—M cC ullough, Ju d g e. T ra d e Comm. nom inee ... . 39
A rm y, new m eth o d in b u y in g coal fo r . . . 98
A sh fro m A lb e rta coals. S c r o g g i e ... *031
Ash. h ig h ...2 67 A sp ira to r ... 780
A uger, h o llo w d rill ... ♦7 7 g
' -v Jk V
1 P ag e A sso ciatio n s and In s titu te s — A ll-A m erican S ta n d a rd s C ouncil— A n n u al e x ec u tiv e conference ... 89— A m er. A ssn. fo r L a b o r L e g isla tio n a n n u a l m e e tin g ... 54
— A m erican C hem ical Society— G as and fu el d ivisions p ro g ra m 5 0 8 ; E x tra c ts fro m p a p ers ... 725
— A m erican E n g in ee rin g C ouncil— M eeting 87. A n n u a l b a n q u et ... 87
— A m erican In s titu te E le c tric a l E n g rs— M iddle E a s te rn D is tric t R eg io n al m eet in g ... 012
— A m erican In s titu te M ining and M e ta llu r g ical E n g rs.— A n n u al m eeting, 53. 2 0 2 ,' 2 8 7 ; P a p e rs. 297, *497, *529. 503. 7 2 3 ; P it ts b u r g h m eeting, p a p e r *225 — A m erican L ist. Steel C o n stru ctio n — E x tr a c ts fro m p ap ers. 39 3 . 420. 40 4 . 630. 874 — A m erican M in in g C ongress— S o u th e rn I n d u s tria l C onference, 4 7 5 ; T rac k and sig n al re p o rt. 5 7 7 ; C in cin n ati co n v en tio n (e) 027. 0 61. 7 5 1 ; P ro g ra m . 0 0 2 ; M eeting ... 73 8 . *752, *756. *758# — A m erican R ailw ay A ssn .— O utlook fa v o r able say s P re s . A ish to n . 2 3 ; R a il ro a d 19 2 0 e x p en d itu re s ... 890
— A m er. Society fo r T estin g M a te ria ls— Coal c lassificatio n m e e t i n g ... 890
— A m erican Society M echanical E n g rs.— M etro p o lita n section. 270. 3 3 3 , 360, 4 2 6 . 5 03. 534, 579. 0 4 2 ; A n n u al m eet in g , p a p e r ...*405
— A m erican W holesale Coal— M eeting . . . . 865
— B oot & Shoe M a n u fa c tu re rs — D inner . . . 202
— B ritish Society o f C o n su ltin g M arine E n gineers, A n n u a l d in n e r ... 441
— C an ad ian R etail Coal A ssn.— M eeting . . 831
— C arnegie In s t, o f Technology— M ining re s ea rc h fello w sh ip s, 5 7 6 ; L e c tu re on In d u s tria l d u sts, 8 1 4 ; L e c tu re a b s tra c ts 844 — Coal M in in g In s t, of A m erica— P a p e rs . . *79
— Coai M ining I n s titu te — V isitin g E x p e ri m e n ta l M ine. * 2 3 1 ; B an q u e t a d d re ss. . *805
— E le c tric P o w e r Club— H an d b o o k of s ta n d a rd s ... 504
— E m p ire M in in g & M eta llu rg ic a l Con g ress— P ro g ra m ... 338
— E n g in eers Society N o rth e a ste rn P en n .— M eetings ... 176. 012, 823 — E n g in eers Society W estern P en n .— M in in g section m e e tin g ... 315
— H a za rd Coal O p erato rs A ssn.— A n n u al m e e tin g ... 283
— H olm es. J o se p h A. aw ard s ... . 44 2 — In s titu te Civil E n g in eers, E n g lan d — P a p e r ...*468
— In s titu te o f M ak ers o f E x p lo siv es——Com m end D r. Mur«roe ... 848
— In te rn a tio n a l R ailw ay F u e l A ssn.— Con v e n tio n . 7 3 8 ; A ddress ... 787
— L eag u e fo r In d u s tria l R ig h ts — D inner . . 40 8 — M ary lan d B an k e rs’ A ssn ... 78 8 — M em bership (e ) ... 320
— M ichigan— Ohio— In d ia n a Coal A ssn.— Y e ar book. 4 0 5 ; P ro g ra m ... 79 2 — M ine In s p e c to rs ’ In s t.— P ro g ra m , 5 7 7 ; M eeting 046. *690, 70 4 — M isso u ri V alley R e ta il Coal M erch an ts A ssn.— M eeting ... . 792
— M o n o n g ah ela Coal O p e ra to rs’ A ssn.— A n n u al m eetin g ... 317
— M on o n g ah ela V alley Coal Mg. In st, organ- , ized ... 351
— M o n ta n a Coal O p erato rs A ssn.— M eeting 25 0 — N atio n a l A sso ciatio n Office A ppliance M a n u fa c tu re rs ... 4 0 4 — N a tio n a l A sso c ia tio n P u rc h a s in g A gents— Coal p ro d u c tio n , co n su m p tio n and sto ck s ... 20. 236, 37 4 . 511, 71 3 . 899 — N a tio n a l Coal A ssn.— T rad e In fo rm a tio n Comm.. *50. Coal s ta tis tic s gets H o o v er san c tio n , 8 6 ; M ark etin g co m m ittee, 378. *7 8 8 : R esearch recom m ended. 5 4 2 ; T o stu d y face accidents, 8 2 0 ; M eeting a n n u a l. *905. (e ) 8 3 5 : P u r c h a sin g ag en ts m eetin g . *914; Sales m a n a g e rs an d ag en ts m eeting. *9 1 5 ; Cost a c c o u n tin g m eetin g . ... *918
— N a tio n a l C ouncil 011 C om pensation I n s u ra n ce ... 2 3 6 — N atio n a l E le c tric L ig h t A ssn... 935
— N a tio n a l F o reig n T rad e C onvention 411. 578 — N atio n a l In d u s tria l C onference B oard— S u rv ey o f la b o r em ployed, 3 7 2 ; U. S. n a tio n a l w ealth . 5 7 9 ; A n n u al m eeting. 8 2 0 : In d u s tria l o u tp u t g ain s. 8 3 1 : U n ited S ta te s tax es p aid . 8 5 7 : Need of tra in in g fo r efficient w o rk , 8 9 3 : P ro s p e rity to c o n tin u e in 1 9 2 8 ... 899
— N a tio n a l M etal T rad e s A ssn.— R eferences to m e e t i n g ... 702
— N a tio n a l R e ta il C oal M erch an ts— M eet in g ... 85 1 . 888 — N atio n a l S a fe ty C ouncil— P ro g ra m m in in g section. 5 4 4 : N ew s l e t t e r ... 640
— N ew E n g lan d Coal D ealers A ssn — M eet in g ...92 6 A ssociations and I n s titu te s — C ont’d. — New Vork S la te u o a i M erch an ts A ssn.— N in tn a n n u a l g ro u p m e e tin g ... — N o rth e a st K entucK y Coal A ssn.— A n n u al m eetin g ... — N o rth w e stern R etail Coal D ealers o rg a n ized ... .. — N o rth w e st S h ip p e is A dvisory B oard— Coal co m m ittee ... — O hio Coai O p e ra to rs A ssn.— D em and c o m p e titiv e scale ... — Oil T rad e s A ssn. In c .— A n n u a l d in n e r. . . — P en n . Coal M in in g In s t, o f J o h n sto w n , P a ... — P e n n sy lv a n ia R e ta il Coal M erch a n ts— M eeting ... . — P en n sy lv an ia Society— M eeting ... — P h ila d e lp h ia Coal E x c h a n g e — M eetin g . . . — P it ts b u r g h M ining In s t.— M eeting ... — P o c a h o n ta s Coal O p e ra to rs’ A ssn.— W age re d u c tio n ... — R ocky M o u n tain Coal M ining I n s t.— M eeting, 33 2 , * 3 6 4 ; P a p e rs . 194. 535. 59 6 . 1 — S h ip p e rs’ R eg io n al A d v iso ry C o u n c i l..:.. — Sm oke E a te rs A ssn.— M eeting . . . ... — Sm okeless Coal O p e ra to rs' A ssn.— Mcct- — T a y lo r Society— P ro g ra m ... — T u g R iv er Coal O p erato rs A ssnit dissolves. — U ta h .Coal O p e ra to rs’ A ssn. f o r m e d . . . . — V irginia Coal O p e ra to rs A ssn.— M eeting. — W est K en tu ck y Coal B u re a u — M e e tin g .. — W est V irg in ia Coal A ssn.— M eetin g . . . . — W inding G ulf O p erato rs A ssn.— A n n u al m e e tin g ... P ag e 4 3 9 202 548 3 7 8 55 305 652 856 61293 362 20 598542 •88 730 6238 8 / 583 65293 924 20 It B all-b earin g m o to rs... ... 316
B ar, b o ltiess n o n -ru stin g sp rin g s p l i c e . . . . 774
B arge, lo ad in g a 1 0 0 0 -to n ... *72
B ask et, w eigh ... *487
B au m p a te n ts ta k e n over by W estin g h o u se 731 B earing, do u b le ro ll self co n tain ed ta p e re d ro lle r ... 770
B earings, b e ariu m ... 250
B earings, deep groove b a ll ... *318
B earing, ro ller, tru c k s w ith s ta n d h a rd w e ar ... *640
B earin g s fo r tra n sm issio n p a rts, T apered ro lle r ...*590
B eltin g saved, w a ste ... 555
B ergius process ... *127
B elgium — C onsum ption, coal an d coke ... 024
?— E x p o rts a n d im p o rts ... 024
— L o ad ra tio c o n tro l ...*352
— P ric e s ... 384
— P ro d u ctio n , coal and coke. 28 1 , 4 5 2 . 477. 520, 55 4 . 62 4 . 936 — Queen p ro v id es fo r m ine o r p h a n s ... 92 3 — Review m in in g coal. 155. T r u a n t ... 171
— Stocks, coal ...0 2 4 . 93 6 B elt slip, Stroboscope m e a su re s ... 301
Bids a n d C o ntracts — B uffalo D ept. P u b lic W o rk s ... 580
— C olum bus B o ard o f P u rch a se. 50, 241, 540. 70 6 . 790. 892 — N av y ... 44 5 . 713 — New' Y ork P u rc h a s e B oard, b id s ... 542
— S h ip p in g B oard bids ... 542
— S o u th D a k o ta ... 740
— W a r D ept, E n g r. d is tric t. P h ila ,. P a . b ids ... 271
/B itu m in o u s — Coal in d u s try h a s reserv e c a p a c ity ... 562
— C om m ercial m ines in U . S. classified b y size o f o u tp u t ... 374
— In d u s try h a s resp o n d ed to dem an d s m ade u p o n i t ... 74
— L oadings. L a k e E rie 1 72. 74 7 , 935 — L u m p coal m ak es good g a s ... 331
— M ethods o f m ining, by sta te s . 1 9 2 5 . . . . 128
— M ines d e m o n stra te efficiency. B a r n u m .. 104
— N u m b er m en em ployed ... 147
— N u m b e r an d y early o u tp u t com m ercial m ines, b y size, c la s s e s ... 657
— O u tstrip s c o m p etin g in d u s trie s ... 7
— P rices. New Y o rk m a rk e t ... 167
— P ro d u ctio n . See " P r o d u c tio n .” — S e lf-re g u la tio n to c u rb ev ils o f o v e r d evelopm ent. D avis ... 139
— S h ip m en ts to G re a t L a k e s ... 519
— W ash in g p la n ts and ad d itio n s. 1926, 13 2 : C orrection . . ... 224
— W o rk in g d ay s an d n u m b e r em ployees 19 2 5 ...v . ... 132
B lastin g , See a lso ' ‘E x p lo siv e s” — C arbon dioxide b rin g s dow n coal a t fa ce. K neeland ... *688
— C arbon d io x id e ... 118
— L iq u id oxygen speeds strip p in g . H o ld erer.* 4 9 7 — S a fe ty affected b y s tem m in g ... 193
— S h o rt fu s e en d an g ers everybody ... 6 0 7
B lock, g ra v ity lo w ering ch ain ... *317
B low pipe, w elding ... 420
B oilers an d F u rn aces — D avis Coal & Coke Co. b o ile r s ... *389
— F a c to rs in gas te m p e ra tu re s ... 501
— F lex o -an ch o r p re v e n ts b u lg in g fu rn ac e w all ... *463
— F u rn a c e im p ro v em en t (e ) ... 836
— G e ar u p the. fu rn a c e (e) ... 027
— H a rd coal fu rn a c e can b u rn s o ft c o a l. . 042
— M eter p an el show s b oiler losses ... *33
— R ec u p e ra to rs f o r o p e n -h e arth f u r n a c e s. . 567
— W ater pipe elim in a te s fireb ric k in steam b o ile r settin g s ... 251
— W indow o n fu rn a c e ...*351
Bond w elded to ra il b a s e ... *749
Book R eview s — A rc W elding ... 398
— M echanical L o ading fo r Coal M ines of P itts b u r g h D istrict ... 398
— R ailw ay F u e l. M cAuliffe ... 606
B orehole a t N ew castle m ine, b o tto m o f . . . *403
B oylan, R ep., a sk s P a rk e r to c o n tin u e coal leg islatio n effo rts ... 305
B razil— S t. Jo h n del Key gold m in e *806 B reak ers a n d T ipples — Bonny Blue Coal Co. tip p le *151, *445 — B rookside b re a k er ...*300
— B unsenville tip p le ... *105
— B u tle r b re a k e r o f P e n n . C oal C o ... *129
— C edron Coal Co. tip p le ... ...*547
— C en tral Io w a F u e l Co. tip p le ... *559
— D avis Coal & Coke Co. tip p le ... 3 8 9 — E lk h o rn -P in ey Coal Mg. Co... — F a ra d a y m ine, tip p le ... — G allow ay N o. 15 tip p le ... * lo — Isla n d C reek Coal Co...*803
— L a n s fo rd b re a k e r ... *308
— Low A sh M in in g Co... *20»
— M ath ias S tin n es ...*329
— M ill Creek Coal Co. t i p p l e *275 *
— N esq u eh o n in g b re a k e r ... *807
— P ru d e n Coal Sc Coke Co. t ip p le ... * ¿2 ?
B re a th in g a p p a ra tu s. M aC aa o x y g e n ... •• 4
B riq u e ttin g — B inding co m p o u n d m ak es b riq u e ts. N agel ... 202
■— G ro w th o f b riq u e t m a n u fa c tu re . Woo- to n ... 823
— L ig n ite b riq u e t p la n t a t N o rth D a k o ta . 732 — L o w -v o latile coal fo r d om estic fuel. N agle ... *638
— N o rth D a k o ta b riq u e t p la n t o f 20 0 to n s d a ily c a p a c ity ... 732
— P ro d u ctio n , b riq u e t ... {?!*> — P ro d u ctio n . F ra n c e ... 5 5 4 B u ck et a tta c h e d to sk ip w h en clean in g s u m p ... 042
B u d g etin g m in e expense d ecreases c o s t s . . . 457
B u d g etary c o n tro l (e ) ... 45o B udgets, G o v 't b u re a u ... o08 B u re au o f L a b o r S ta tis tic s — T o m ak e la b o r s u rv e y ... °0
B u re au o f M ines — A p p ro p riatio n s 3 0 4 . 374 — B la stin g te sts ... 333
— C auses o f fa lls o f m ine r o o f s 8oo — C lassification o f c a rb o n iz a tio n p ro cesses. 361 — D ynam ite w ill ig n ite coal d u s t ...’ 231
— E lec tric a l sa fe ty ru le s ... 8»
— E x p lo sio n te s t a t E x p e rim e n ta l m i n e . . . *849
— F a ta litie s ...272, 34 0 . 470. 614. 822 — F ieldner, A. C., ch ie f engineer E x p e rim en t s ta tio n s ...*S88 — L ig n ite in v e stig atio n ... 194
— M ining gets m eag er sh a re o f fu n d s . . . . 8b — P erm issib le e le ctrica l e q u ip m e n t. Iisley ..* 5 9 8 — R esearch w o rk w ith B ritish ... O H — S a fe r explosives and b la stin g m eth o d s in v e stig atio n ... 193
— S a fe ty w o rk . 1926 . . . . . 113
— Stocks, coal ... * -6 8 . *69* — Subsidence, Illin o is, stu d ied ... 881
— T e stin g ex p lo siv es p h o to g ra p h ic a lly . . • 43 o — T e sts on sto p p in g s ... lj> — V alue of lig n ite as fu e l ... *>«' B u re au of R ailw ay E conom ics— F re ig h t h a n d le d b y C lass 1 ra ilro a d s 507. 544. »84 B u rn e rs on steam sh ip s. P u lv e rize d c o a l. . . 46
B usiness cycles ... 702
B ustness setb ack , no lik elihood ... 18
B uying. See P u rc h a s in g P a g e Cable. Condex < / o Cable gu ard , sup er-serv ice . . ... 7 7 4 Cable s u p p o rt ...* - ¿ 2
Cable su spension a t New O rient ... *o73 C able suspension. Socket lik e w ire rope used fo r ... *436
C alcu lato r, fu ll a u to m a tic ... C am -type lim it sw itch ...*101
Canada — A lb erta fre ig h t r a te to O n ta rio - 309 — A sh fro m A lb erta coals. Scroggie . . . . * 6 3 1 — B ritish E m p ire S teel Corp., finan cial d if ficulties. 4 3 9 . 4 7 9 : R e o r g a n i z a tio n ... 893
— B u n k e r coal d u tia b le ... 00
— C ape B reto n sh ip m e n ts ... »9
— Coke— P ro d u ctio n , e x p o rts, im p o rts. 26 , 24 2 . 513. 825 — D ickson. J a s .. B. C. ch ief m ine in sp ec to r. 27 •— D om inion Coal Co.— P ro d u ctio n ... 582
— E x p o rts and im p o r ts . . . ,5 6 . 1 7 2j 05 1 . _^ — H ig h er d u ty p ro p o sal tab led ... 309
— N ova Scotia m ines a ct to b e re v ised . . . 3 7 i — P e a t, gov ern m en t to m a rk e t ... 309
C anada— C ont’d. — P ro d u ctio n , coal and coke. 50, 172. 41 1 , 47 7 , 651. 8 9 3 : B ritish C olum bia. 275. 58 2 . 70 7 , 83 1 . 9 2 8 : A lb e rta . 3 4 3 ; N ova Sco tia ...2 07. o47 — R eview m in in g . Cook ...154. 172 — T ax . A lb e rta m in e o w ners ... 411
C ap ital and la b o r m ore h a rm o n io u s . . . . 70 0 C arb o n iz atio n . See "C o al." C arp en ter shop u n d erg ro u n d ... * - 3 -
Cars — A d v an tag es o f im p ro v ed m in e c a r s . . . . *74
— A ssigned c a r case. O bject to m e r g i n g . .. 300
— Bids s o u g h t ... 40o — C ouplers, a u to m a tic m in e c a r ... *777
— C ro ssb ar p ro te c ts p u s h e r s ’ fingers and h e ad ... ">1 — D isp atc h in g a t N ew castle Coal C o...*532
— D ro p -b o tto m car. a ll s te e l ... — F e e d er engages c a r b u m p e r ... *°2=
— N o lan a u to m a tic m in e c a r f e e d e r ... 77o — O rders, new c ar ...339, 5 75, 61 3 , 888 — P a in t p re serv es body m ine c a r . . . . *844
— S a fe ty k in k s p re v e n t ru n a w a y c a r s . . . . * o 7 2 — S cooter, m ine ... — S p rag g er squeezes w heel tre a d s... ... *o0o — W hopper a u to m a tic m in e c a r ... *935
C arto o n s ... , ... 405
Cave dam age. III. c o u n ty su es f o r ... 7 8 9 , Cave in d estro y s m in e s h a f t ...*810
C em ent p ro je c to r ... 937
C ensus. H o o v er u rg e d to p u sh d is tr ib u tio n . 439 C ensus o f d is trib u tio n ... 79 7 C en tral C o m p etitiv e F ie ld o p e ra to rs m eet, 175. 20 3 C en tral c o m p e titiv e field p o o r u n it fo r se ttlin g w age ra te s »73
C en trifu g es, d ry in g fin er sizes of coal. D uck ... *219
C h am b er o f C om m erce of U. S.— P ro g ram . 44 0 , 5 7 6 ; B u lletin on acco u n tin g . 4 7 5 ; E x tra c ts fro m ad d resses.7 0 0 . 703. 72 5 . 929 C h arac te r e x p e rt tells h o w to pick "liv e ones" ... 82 3 C hem ical <f M e ta llu rg ic a l Engineering, 2 3 1 . 33 1 . 427 Chinn — C losing c o n tra c ts ... 383
— C oaling riv e r ste a m e r ... *19
— P ro d u ctio n , coal ... 4»7 C hronology 13 261 C h u rch es o f C h rist in A m erica. Fed eral Council— Offers s trik e so lu tio n ... ¡»09
C in cin n ati C ham ber o f Com m erce— E x tra c ts fro m G andy ad d ress . . . .8 1 0 , 843. 878 C laire F u rn a c e Co. decision ...>79, (e )o 9 1 C lam p. H an d y ra il . ... • . . . . 777
C lam p h a s do u b le h o ld on a rm o r o f cable *»73 C lam p, h e av y d u ty ...*901
C lam ps, T u -w ire a n d P u llem ... *776
C lassification m ines b y w ag e-co n traet. T ryon an d R ogers ... 14o C linker, gold ... «67
Coal — B u ck w h e a t firing ... 534
— B u ck w h e a t f o r do m estic use (e l ... 35
— B y p ro d u cts fro m one to n o f c o a l 4 2 7 — C arb o n iz atio n . F ield n er ...*124
— C arb o n iz atio n , low te m p e ra tu re ... 294
— C arb o n izatio n . M echanics in v o lv ed . B lau- v e lt ... ... . . . * 4 6 o — C a rb o n iz atio n o b ta in s five tim e s e le c tri cal e n erg y ... 687
— C a rb o n iz atio n process. C la ss ific a tio n . . . . 361
— C arb o n izatio n . V alue o f p ro d u c ts ... 92 9 — C lassification. A m er. Soc. fo r T estin g M a te ria ls h o ld s m eetin g on c o a l. . . . 890
— D eveloping new uses. H am m ond ... 103
— F e rtiliz e r, coal as ... 570
— G asificatio n p ro d u ce g as a n d a-sh. Com- pi e tc ... g84 — L e ft in th e g ro u n d , coal (e ) ... 320
— Low v o la tile b riq u e tte d fo r d om estic fu el. N agle ...*638
— M erchandised. Coal m u s t be ... 630
— M ost re lia b le fu e l as pow er g e n e r a t o r .. 3 1 5 — N otes on coal a n d its m in in g . A sh le y . . *805 — P n e u m a tic s e p a ra tio n oxidize coal? D uck ... *47
— P o w d ered co al fo r b arg e lin e . . . ... ¡>44 — Pow dered coal u rg e d fo r s te a m s h ip s . . . . 441
— T oo c o stly ( e ) ... 661
Coal A ge— T e n y e a rs ago. 13 , 26 1 . 301. 501, 6 4 1 ; Index, 78. 197. 2 2 4 ; Price index revised. 8 3 1 : T o b e p u b lish ed m o n th ly . 9 0 3 ; S u b sc rip tio n s extended. 90 4 , 9 2 2 ; X e ic s ... 924
C oal In d u s try — F aces u n ju s t c ritic ism in fa rm -re lie f d e b a te . W ooton ... 177
— P o o lin g in fo rm a tio n ic ) ... 388
— R eg u latio n foreseen in 1927. C ongres sio n al cam p aig n to e sta b lish . C un n in g h a m ... 122
— R e h a b ilita tio n (e ) 28;»
Coke an d Coking — B elgium , p ro d u c tio n , co n su m p tio n , e x p o rts a n d im p o rts ... 624
— B ritish C olum bia p ro d u c tio n ... 275
— C anada, p ro d u c tio n , ex p o rts, im p o rts. 26. 242. 411. 51 3 , 6 5 1 . 825 — Coal u sed in m a n u fa c tu re coke. See "C o n su m p tio n ." — D om estic fu e l— I t e lim in a te s s m o k e . . . . 42»
— F r e n c h p ro d u c tio n ...88. 38 4 — P ro d u c tio n , U . S 8 9 .3 3 8 , 4 4 0 .4 5 1 , 6 4 8 , 74 7 . 93.» — Use as d om estic fu e l . . . 33 3 Colliery G uardian . ... 265
P a g e P ag e C olorado — F ir s t aid, advanced, to o fficials... 24
— N u m b er m en a t m ines ... . . 205
— P ro d u c tio n ... 5 7 ,2 0 5 ,3 4 1 . 4 7 8 . 649 — Review m in in g o p e ra tio n s ... 153
C om bustion econom ics ... 684
C o m bustion, sp o n tan e o u s ...*811
C om m issary an d office. H ig h S p li n t... *651
C om panies, Coal — A m erican Coal Co. o f A llegany Co.— R ep o rts ... 741
— B eech F o r k B lue Gem Coal C o ... *59
— Bell & Z o ller M fg. Co.— U n d e rg ro u n d re p a ir sh o p s ... *434
— B ernice A n th ra c ite Coal Co.— R u sse ll ville. A rk . m in e ... *017
— B erw in d -W h ite Coai M ining Co.— S crap er lo a d e r in th in coai ... *875
— B eth leh em M ines C orp.— P r o d u c tio n . . . . 4 7 4 — Big Ben Coal Co.— R e fo re s tin g ... 205
— B lack M o u n tain Coal C orp.— U nderg ro u n d a u to m a tic c o n tro l ... *462
— B lack S ta r Coal Co.— L ow ty p e locom o tiv e s ...*879
— B loom field Coal & M ining Co.— S h a ft cave-in ... *810
— B onny B lue Coal Co.— H eadhouse, *376: T ipple. *445; R ope cen terin g sheaves. *4 7 9 ; O u tside tra c k a g e ... *740
— B ryson Coai & Coke C o ...,* 3 4 3 — B u rn s B ros.— R ep o rt, 27 3 , 3 4 2 ; D ivi dends 444
— Cedrom Coal Co...*199
— C en tral Coal & Coke Co.— R e p o r t 376 — C en tral Io w a F u e l Co.— Steel c ro s sb a rs . *643 — C en tra l P o c a h o n ta s Coal Co.— E x p lo sio n Sh an n o n m ine ... .. . 73 8 . 791 — C hicago. W ilm in g to n & F r a n k lin Coal Co. — C a rp en ter sh o p u n d e rg ro u n d a t Va- lie r. * 2 3 2 ; F la p s sav e c a r trim m er, *3 0 1 ; L o w e rin g re p a ir g an g a t New O rient. * 3 0 7 ; W ire h a n g er w elded in place. *3 6 8 ; C rane a t New O rient. * 5 0 7 ; Cable su sp en sio n a t N ew O rient. * 5 7 3 : T o rn ad o s trik e s N ew O rie n t. . 702
— C linehfield Coal C orp.— R ep o rt, 2 75. 406. 7 9 1 ; D ividends ... 7 4 0 — C olonial C olliery Co.— R ock tu n n e ls re duce h a u la g e c o sts ...*719
— C olorado F u e l & Iro n Co.— C en trifu g a l d rier. * 2 2 3 ; F a ta l accid en ts reduced 50 pey cent. 3 0 7 ; Coal and coke p ro du ctio n . 5 1 9 ; E ye in ju rie s r e d u c e d .. 643
— C olum bia Steel C orp.— H ig h coal ex tra c tio n *525
— C onnellsville B y -P ro d u ct Coal Co.— E x p losion. 2 0 3 : R escue m en succum b, 5 1 1 : P it ts b u r g h - Sew ickley c o n tro v e rsy 8 99. (c) 809 — C o n so lid atio n Coal Co.— S h o rt cro ssb a r on c a r p re v e n ts in ju ry , * 5 1 : F ire e x tin g u ish e r. * 2 3 0 : O u tp u t b re a k s record. 4 4 2 ; R ep o rt. 4 4 5 : D isease p re v e n tio n p ro g ram , 5 4 7 ; D rin k in g fo u n ta in s. *569: C oncrete p illa r nosing. • 0 0 5 : O rg a n iz atio n . M e l e n d y ... *678
— C o n so lid atio n Coal P ro d u c ts Co.— E lec tric a lly w elded b riq u e ttin g p l a n t . . . . *300
— C onsum ers M in in g Co.— B u ck et a tta c h e d to sk ip w hen cle an in g su m p , *6 4 2 ; Sp are h o is t sh ea v e k e p t tru e , *850: H o sp ita l a t H a m a r m in e ... *874
— C o n tin en tal Coal Co.— P ittsb u rg h -S e w ic k - Icy co n tro v e rsy ...899. (e) 869 — C osgrove-M eehan Coal C orp.— R ep o rts. 25 . 512. 0 16. 8 9 2 ; B uys R achel m ine ... 337
— C rozer Coal & Coke Co,— L a b o r p o li cies (e ) 28 6 —•Davis Coal & Coke Co.— P u r ity of p ro d u c t. W hite. * 1 9 7 ; C en tral pow er s ta tio n lo ad s ...*389
— De Bardelc/ben Coal Corp.— S h a ft m ine co n v erte d to slope ...*397
— D ecp w ater Coal Corp.— Seeks b e tte r b u n k e rin g a t M obile ... 236
— E lk h o rn Coal C orp. — R ep o rt, 4 4 3 : L o a d in g boom ... *824
— E lk h o rn P in e y Coal M g. Co.— C h an g in g screens, * 4 2 ; P la n ts com bined for econom y ...*299
— E llsw o rth C ollieries Co.— E x p l o s i o n . . . . 511
— E n o s Coal Co.— L iq u id oxygen speeds s trip p in g . H o ld erer ...*497
— E p h ra im C reek Coal & Coke Co. so ld . . . 337
— F o rd so n Coal Co.— C o n test ta x e s. 5 7 : S u b s ta tio n , * 5 3 4 ; R o p e-an d -b u tto n co n v ey o r a t N u tta lb u rg m ine. *629; R e p a ir p it w ith w ide l e d g e s ... *851
— F o rk R idge Coal Sc Coke C o ... *309
— F re d e ric k to w n Coal & Coke Co.— A erial tra m w a y ... *491
— G allo w ay Coal Co.— S h e a rin g device a t m ine No. 15. *10; E n g in e go v e rn o r on h o is t w a rn s o f overspeed. • 3 3 4 ; (D iscu ssio n ) ... 6 0 7 — G a ll iff Coal Co.— M eters and h o u se en erg y ... ... 470
— G a tliff-M ah an -P erk in s ...*707
— Glen Alden Coal Co.— Im p ro v em en ts in pow er eq u ip m en t. S^om Sc Gealy. *593: R efo restin g . 6 1 6 : E x plosion T ru esd ale, 6 5 0 : E x p lo sio n W oodw ard. 821. 8 5 5 . 928 — G reat W estern C oal Co.— S p rag g er . . . . * 5 0 5 — H arleig h -B ro o k w o o d Coal Co.— T u r n stile - • *538
— H a rris b u rg Coal Mg. Co.— M in in g m e th ods ...*428
— H arw ic k Coal & Coke Co.— R e c o n s tru c t ed ... *423
— H illc re st Collieries— R ep o rt ...411
— H udson Coal Co.— P ro d u ctio n , coal. 5 8 0 ; B ond issue. 8 5 2 : W. H . W illiam s to
le a v e ? *J~4
— Ilsley Coal Co.— E x p lo sio n ... 2 0 3
January-June, 1927 C O A L A G E 5
P ag e C om panies; Coal— C ont’d.
— Isla n d Creek Coal Co.— D ividends, 2(5, 4 4 5 ; R iv e r tip p le h a n d le s 8.000 tons d aily . E d w ard s. *71; Stock sp lit up.
.177, 2 0 3 ; B onus p aid. 2 0 7 ; R eport.
4 0 6 . 51 3 . 6 1 7 ; C aterp illa r gasoline shovel. *5 4 6 ; M ine N o. *22, *635;
P ro d u ctio n , 7 41. 0 2 8 ; M inor changes a t M ine N o. 21. *803; Tw o m ine sub*
s ta tio n . * 8 4 5 ; B uilding houses tw o
sh o p s a n d office, ... .. - • • • 640
— L e h ig h & W ilkes-B arre Coal Co.— R eport 581 — L e h ig h Coal & N av ig atio n Co.— C apital s tu d y m em b ers q u it, 1 7 4 ; Segregation c oal p ro p e rties rejected. 3 4 2 ; To strip b u rn in g a re a a t S u m m itt H ill ... 700
— L e h ig h V alley Coal Co.— R e p o r t . . . 406
— M cK inney Steel Co.— W o lfp it m ine. *200; H a u lag e locom otive changed to reel. *3 6 9 ; H an d -o p erated oil sw itch. *369; C onnection change fo r te stin g ... 695
— M ah o n in g Coal R .R . Co.— R ep o rt. . . . 3 7 / — M ill C reek Coal Co.— P o r ta l m am slope. *2 7 4 ; T ipple and w asher. *275; S p rin g s o f screen of F o rd p a r t s *335 — M t. C arm el Coal Co.— A u to m a tic s u b s ta tio n ... • • • 0
— N ew castle Coal Co.— P u m p s ta tio n h a s ren ew ab le suction. *334: E lev a te d re p a ir p it. *402; B ottom o f borehole. *4 0 3 ; Trolley shoes. *4 3 7 : P e rf o r m ance record new m in in g m achines. 4 6 0 : D ouble m o to r driv e o f fa n for sm all space. *471: C ar d isp atch in g . • 5 3 2 ; S p rin k le r c a r and d u s t a n a ly z in g eq u ip m en t *539
— New E n g lan d F u e l & T ra n s p o rta tio n Co. — E x plosion ... 648. *702, 856. •S 8 2 . (e) 869 — N ew R iv er Co.— Cable suspension. *436: R ep o rt ... 617
— N o rth A m erican Coal C orp.— B uys se ll in g agency ... 306
— Old Ben Coal Corp.— R oller b e a rin g tru c k s w ith s ta n d h a rd w e ar ... *640
— Old C ato Coal M g. Co.— M iners tra p p e d in flood ... 580
— P a c ific C oast Co.— R ep o rt ... 479
— P e a b o d y Coal Co. record lo a d in g 240 — P e n n sy lv an ia Coal & Coke Co.— R eports. 274. 34 3 . 51 2 . 581. 8 2 4 ; E h ren feld explosion. *510, 5 8 1 ; E a rn in g s ... 6.>0 — P e n n sy lv an ia Coal Co.— B u tle r b re a k e r and w a sh e ry ... • • *139
— P e n n sy lv a n ia Coal Co.— M ichael G alla gher. ch airm a n ... *■'>;> — P h e lp s Dodge C orp.— Safe firin g o f sh o ts a t D aw son. H olm an. *14; S am pling an d te stin g m ine-road d u st. *233; S a fe ty k in k s fo r m in e cars. *572: P o rta l No. 8 m ine. *616; Side d u m p ing. * 6 5 0 ; H o sp ital. D a w so n ... *706
— P h ila d e lp h ia & R ead in g Coal & Ir o n Co. S e ttle s m o rtg ag e . 6 5 0 : In s ta lls electric pum ps. 6 5 0 : C o u rt decision engineers can e n te r m ines ... 824
— P it ts b u r g h Coal Co.— R educes wages. 176: W ill s tic k to open shop o p eratio n . 3 0 4 ; R ep o rt. 4 0 6 : P ro d u ctio n . 5 8 1 : Sale. 822. 8 5 5 : L is t sto ck on E x ch an g e ... 028
— P itts b u r g h T erm in al Coal C orp.— R eport. 274. 7 0 6 ; C rossover c o n s tr u c tio n . . . . *429
— P o c a h o n ta s F u el Co.— H o u ses a t F a r a day. *3 0 4 ; P o r ta l, m ine ... ££9
— P o n d C reek P o c a h o n ta s Co.— R e p o r t . . . 740
— P ru d e n Coal & Coke Co.— R ailin g for re p a ir p it. *17: C oncrete p o sts c u t tro lley costs. * 8 4 : In n o v a tio n s. E d w ard s. *185; A irp la n e v ie w s. . . *342. *582 — P y ra m id Coal Co.— T r a c to r u se fu l in s trip p it ...: ... 468
— R ailw ay F u e l Co.— P a r r is h m ine. R am say ... ....-• * 3 7 4 — R ainey. W. J.. In c.. b u y s Old H om e n la n t 372 — R oane Iron Co.— E x p lo sio n a t Rock- wood. E d w ard s. *8 ; F a n connected to hoi«* d ru m ...*368
— Rofrers E lk h o rn Coal Co.— Signal lig h t fo r h o istin g . *673; T ram ro ad . *791; U ses m odern m ethods and e o u ip m en t..* 8 3 7 — R oval Bln« Coal Co.— A rc w all c u tte r. _ *410: U n d ercu ttin g Jellico seam . . . *¡>13 — S t. L o u is R ocky M o u n tain & P a cific Co. — M u ral d eco ratio n ... . . . . 152
— Saline C o u n ty Coal Corp.— E x p lo sio n . . 511
— S a x to n Coal Co.— F ir st- a id c r e w . . . 114
— S c ra n to n Coal Co.— Men escape w hen cage fa lls ... - • ' 66
— S h eridan-W yom ing Coal Co. bonds. 3 7 1 ; S a fe ty h o o d ...*343
— S o u th C hicago Coal & Dock Co.— Leases D udley m ines ... 374
— S o u th e rn Gem Coal Corp.— R eceivership _ ends ... 30;> — S ta n d a rd C oal Co.— O vercast of corru- g ated iro n ... *;>0 — Stonesra Coke & Coal Co.— D «rbv m ine. B rosky. *3; M ine su rv ey s. * 2 3 2 : Room and P illa r m eth o d s. * 3 2 1 : W a te r im pou n d ed fo r b a th ho u ses. *469; Mine c a r p a in te d b y sp ra y gun ... *844
— S u n d av Creek Coal Co‘— T h irty -y e a r fire ex tin g u ish ed ... 5**
— S u so u e h a n n a C ollieries Co.— R efo restin g . 616 — Sycam ore Coal Co.— R ope and b u tto n convevor. *6 8 2 ; C inderella m i n e . . . . *843
— U nion C olliery Co.— W ork in g s K ath leen m ine ... *604
— U nion P a c ific Coal O n — Old T im e rs’ A ssn. g a th e rin g . H a le ... 8«6 — U nited E le c tric Coal Co.— R e p o r t. .4 0 9 . 858 — U nited S ta te s Coal * Coke Co.— S afefv record. 2 0 3 : P o r ta l N o. 4 m ine. *338: View a t G a r y ... *444. *928 — U nited S ta te s F n « l Co — F ir st- a id and s a fe tv w o rk . * 1 9 5 ; S um o c le a n e r. - .* 2 9 6 — V alier Coal Co.— Thr«« u n d e rg ro u n d s u b s ta tio n s. *;>0: S w itch b o ard m ade a c cessible ... *471
P ag e Com panies. Coal— C ont’d. — V ictor-A m erican F u el Co.— D e lag u a ex- plosion ...8 2 1 . 087 — V irg in ia Iro n . Coal & Coke Co... . 207
— W est K en tu ck y Coal Co.— M o to rizin g stean i-d riv en fa n s. W ilburn ... 847
— W estm o relan d Coal Co.— R e p o r t... o81 — W est V irginia Coal & Coke Co.— E lec tric ia n s and m a in te n an c e men m e e t .. *341
— W ilk es-B arre C olliery Co.— M ine-oar s a fe ty ho o k ... 850
C om pensation — A n aly sis claim s beneficial. H a rrin g to n . — P en n , am en d m en t ... 4 09. 5 12. 546. — W. Va. f u n d so lv en t ... C om p etitio n source of ideas. K e e n ... C om pressors. A ir. sm all u n i t s . ... C oncrete — P o s ts c u t tro lley co sts. C o n crete. ... — S to p p in g s, steel re in fo rce m e n t in m i n e . . . C onduit e rectio n . New box sav es l a b o r . . . C o n solidations aid m a rk e ts ... i . .
C o n su m e r.' F ro m th e u ltim a te . Mo y e r . . . . C onsum ption — B elgium , coal and co k e. . . . — Coal by C lass 1 ra ilro a d s . — Coal in coke m a n u fa c tu re 596580 578 5192 1 6 45 1 . — E llsw o rth C ollieries Co... — E x p lo siv es a t coal m in es . . — F ran c e , coal ... — I n d u s t r i a l 2 0 . 23 6 . 374. — P u b lic u tility po w er p la n ts . . . , .5 4 . 406. . . 89. 648. 5 11. 2 67. 519. 213. 338.519. 747, 408.713. 700. -U n ite d S ta te s *84 *6815 325367 821 935511 784384 899 899697 D u m ping m a rk . S an d u sk y s e ts . . . . D um pings. H a m p to n R oads ... D um ping, side ... D um pings. Toledo ... D um ps, ro ta ry , a t D erby m ine ... D ust. See also “ R ock D u st” — C onsu m p tio n coal d u s t ... — D iscussion a t A .I.M .E . m e e tin g ... — D u st-c ate h e rs f o r pneu rm itic to o ls ... — P re c a u tio n s a g a in st ig n itio n — S am p lin g and te stin g m ine— ro a d d u st Phelps-D odge m in es ... K P ag e 737 •6 5 056 713•3 846291 814 •4 2 5 *233 Conveyors — B elt co nveyor id le r r o l l ... 7 7 5 — C onveyor s u p p la n tin g m o n ito r ... — K o alv ey o r ...- • • 1 • «
— O p eratio n re ta rd in g conveyors. Ed- w ard s ... — R o p e-an d -b u tto n co n v ey o r lessens b re a k age ... 6«9 — S h a ft m ine co n v erted to slope and belt co n v ey o r o p e ra tio n ... *3 9 / Costs — A cco u n tin g aid in o p e ra tio n . C o st. 918 — B u d g etin g m ine expense decreases co sts 4o7 — D ay-by-day u ses o f b u d g e ts ... 96«
— E x p lo siv es ... £3 9 — F u e ls fo r d om estic h e a tin g ... -70
— M achine re p a ir cost ... £66
— O p e ra tin g c o sts o f jig s . . . . . . . . . . . 76*.
— R a ilro a d fu e l. . . .5 4 . 21 3 . 33 8 . ¡>19. 6o7. 8~1 — S ickness a n d d e a th . ... £ o l C ouplings. C ord d is k flexible ...- • 7oO C ouplings. U n su p p o rte d s h a f ts d riv en hy fle x ib le ... *799
C o u rts — A ssigned c a r case. O bject to m e rg in g . . . 306
— A ssigned c a r decision ... 8o3 — A vent c o n v ictio n u p h eld ... *>« *— C edar B luff receiv er ap p o in ted v ... - 6
— C laire F u rn a c e case ...579. (e ) ¡>91 — C o n tem p t p e n alty re m itte d Snyder. B arn es & B en n e tt ... • »3
— Decision on re m o v in g coal fro m pub lic p ro p e rty ... 60
— D ecree u p h e ld a g ain st un io n in te rferen c e w ith W. V a. open-shop m i n e s ... *»11
— D ings w ins p a te n t ... 716
— D rain ag e decision. F e n n ... 739
— E m m o n s Coal Co... «3
— E n jo in s s trik e to h a m p e r u se of p ro d u c t ;>42 — F ed eral T ra d e C om m , b lo c k e d in b read and flo u r case ... • • • • • , ... ,7 7 — F ire in su ra n ce ra te s in K en tu ck y ... 444
— G ovt, lo ses a ctio n on cancelled c o n tra c t. 3 4 9 — K e n tu ck y R iv e r Coal C orp. v s. E lk h o rn H a za rd ...• • ■ 8 01 — L ib e rty Coal & Coke Co. v s, F e d e ra l Coal r;0 20;> — M ay n ard case ... 048. 7 13. 737. 9 2 3 — P an -H an d le Coal Co... 349
— Severance ta x of W. V a. s u sta in e d . . . <88 — S uprem e decision in Sew ick ley -P iU sb u rg n c o n t r o v e r s y ... «99 (e ) «<»3 C rane a t N ew O rien t m ine ... «67
C ranes m o u n te d on m o to rs ... 799
C u n ard sh ip s m ay b u rn coal a g a i n ... «3.»
C u tters, Coal — C hain c u tte r. C in cin n ati . . . 7 7 8 — Coal c u ttin g m a c h in es in L . S. and G re a t B rita in ... gJW — S h e a rin g m ach in e, c en ter ... C zech o slo v ak ia— Coal p ro d u c tio n ... 4 / /
D D am per, V ib ro ... D e-aerato r in creases efficiency ... ¡>95 D e aler-cu sto m er serv ice p lan . H a re . . . . . o - o D iestocks. A d ju stab le ... £16
D iestocks. R eceding ... 31»
D iseases in G t. B rita in m in e s . ... «££ D istances d eterm in ed w ith o u t s c a lin g . . . . 369
Door, a u to m a tic ... *>« Doors, a u to m a tic tre a d -ra il ... D rainage and d ry in g coal a fte r w ash in g . W arden-S tevens ... 430
D rain ag e code, m ine ... /U~ D riers. See “ P re p a ra tio n . D rills a n d D rilling — D rill p ress fro m sc ra p m a te r ia l... E lec tric d rills w ith u n iv e rsa l m o to rs . . *248 S h o th o les b y m a c h in ery , d rillin g . . . * 1 1 6 D um ping accelerates m in e o p e ra tio n . T rip R am say ... 6 /4 E conom ic conference. W orld ... 5 0 8 , 577 E conom ic p ro g ress h o p e fo r new y ear, says M r. H oover ... * • 54
E conom ics coal m in in g d iscussed b y N . f . H o pkins ... 315
Econom y, long ran g e (e ) ...i«*4 E d ito ria ls — A ccidents fro m fa lls o f r o o f ... . £06
— A ir b la sts b rin g new h a z a rd s . . . 83o — All to th e good, b u t none too g o o d . . . . «70
— As co m p ared ... 801
— A t la st a k in g ... -1 «
— A u x ilia ry v e n tila tio n ... 3o — B an ish in g one d a n g er ... — B. & 0 . p la n ... 3 5 3 — Be rep resen ted ... p«* — Big m en in in d u s try ... «23
— Big sav in g s fro m sm all i n v e s t m e n t s . .. . 28 u — B u d g etary c o n tro l ... £*>” — B uying a la w su it ... «63
— C ash in g in on p u b lic e d u c a tio n ... 35
— C en tral h e a tin g ... I«4 — C hallenge to sound th in k in g ... 217
— C in c in n ati c o n v en tio n ... 6-7 — C larificatio n w a te r by m ine e f f l u e n t s . . . . 422
— Coal to o costly ... 6 6 1 — C o ntrolled h e a t ... »3«
— C u ttin g dow n item 1 on cro ss s h e e t. . . . 8Ui — D isarm am en t. No tim e f o r ... 69
— D istrict a g re em en ts ... 591
— Econom y, L o n g -ran g e ... 3«3 — E d u c a tio n a n d in d u s try ... 4 2 - — E d u c a tio n . E v an g elism in ... 5;>8 — E ffluent. T re a tin g m ine ... 5«7 — E lim in a tin g u n iv e rs a l g enius ... 5 - 4 — E m b arra ssed b y its reso u rces ... »69
— E v a lu a tin g tim e ... J — E x a m p le th u n d e rs ... — E x tra v a g a n c e in o p e ra tio n ... «5»
— Eye. An e le ctric ... 4 - i — F ace fo rem o st ... ¿1 »
— F a c in g th e issu e s ... g-jg — F a v o re d b u t neglected ... »go — F in d th e fa c ts ... 387
— F ire losses. O u r n eedless ... *>¿7 — F ire p ro te c tio n ... £«9
— F ire p rev e n tio n en g in eerin g ... »61
— F o re fro n t of p ro g ress ... «92
— F o rg in g a h e a d ... 2 o l — F u rn a c e . G ear u p th e ... «27
— F u rn a c e im p ro v em en t ... »30
— Get a f te r th e sm all le a k s ... 184
— Gods o f h ill o r p la in ... 251
— “ H o p p in g ” a fre ig h t ... g2U — Im a g in a tio n and s a fe ty ... «27
— In d u s tria l co-o p eratio n ... — I t c a n n o t h a p p e n — b u t i t d o e s ... 869
— K eeping u p w ith th e J o n e s e s . ,• • • • — L e a rn in g fro m th e p a st. 2 : D iscussion . 4 0 0 — L en g th e n in g p u b lic s h a d o w ... - g - — L o ading, B efore o r a f t e r ... 59«
— L u x u ry p ro d u c ts. Six ... l»*4 — M anagem ent as a science ... £ — M an ag em en t’s re tu rn s ... — M an and th e m ach in e ... 7 o I — M ass p ro d u ctio n ... -»¡> — M iam i in re tro s p e c t ... ‘g i g — M in er’s iso la tio n . . ... «28
— Mine w a ters as algicides ... £«*> — M ining to w n e d u catio n ... 3 8 ^ — M o n th 's sh u td o w n ... 717
— M u tu al u n d e rstan d in g b rin g s its re w a rd . 286 — N a tio n a l Coal A ssn. a n d p ro g r e s s ... 835
— Needed m ore th a n ev er ... g i g — N ew k in d o f th in k in g ... 80«
— No b a c k w a rd step ... £«3
— N o m ore d irt b a lla s t ... 604
— N 0 place fo r p o litic s ... 717
— N o t e x ac tly w asted ... g2g — Of m en and m ech an ism ... >ig — P a d d in g th e expenses ... * — P a id fo r b o th m ills ... 18 3 — P a s t is p a s t ... ,4»«
— P a y s fo r w h a t h e fa ils to g e t ... 69
— P e rs o n a lity in b u sin ess ... «17
— P e rso n a l In v e n to ry ... £ — P o llu tio n t h a t p ro te c ts ... «9
— P o o lin g in fo rm a tio n ... 38 «
— P ra c tic a l tra in in g ... 717
— P r e tty m e s s ...- ... £6 0 — P u b lic ity m a k e s for h u m a n w e l f a r e . . . 354
— R efu se? W h a t sh all be done w ith c o a l. .. go« — R e h a b ilita tio n coal in d u s try ... 2K._> — R e p a ir shop does it. N o t a s ... 4gfi — R o ad to peace ... £ 2 1 — R ock d u s t m a in ro a d s ... y g ” — R o o f fa lls. F o re s ta llin g ... £21
— S afeg u ard s. P ro v id e . . ... — S a fe ty in good en g in eerin g . ... 2*»
— S a fe ty in life s a v in g ... * S c ra p p in g th e ob so lete ... go — Step. T h e n e x t ... 387
— Still in th « d a rk ... ■ • • - - • • ” 91
— S trateg y , N o tim e fo r. 48.9: D iscu ssio n . 570 — S tu rd ie r e au ip m e n t is c o m i n g ... go — T h in k in g in m u ltip le ... 604
— T rag ed y o f w a ste ... '¿ 5
— U n reco g n ized necessity ... — Tip fro m th e ra n k s ... - ... £ ” 2
— V a lu e o f goodw ill ... '£ » — W atch . E n te r th e sto p ... ” 9£
— W ith o u t to o ls ... 3*>3
6 C O A L A G E Vol. 31
E d u c a tio n a n d T rain in g
— E d ito ria ls ...31 9 . 387. 42 2 , 5 58. 717
— F irst-a id a n d sa fe ty a t U. S. F u e l Co.
m ines ... li)5
— F u e l engineering- co u rse a t U. o f P 578
— H ow ard B usiness School— A d d re ss 885
— N'eed o f tra in in g fo r efficient w o r k ... 893
— P e n n . S ta te College, su m m er c o u rse. . . . 892
— P h e lp s Dodge u n d e rg ro u n d s c h o o l... 3 0 4 — R esearch fello w sh ip s. M ining ... 570
— S a fe ty tra in in g fo r te a ch e rs a t N o rto n , V u ... 445
— S h o rt tim e co u rses by colleges ... 701
— Society fo r P ro m o tio n o f E n g in eerin g E d u c a tio n , su m m e r school ... 820
— Su m m er coal co u rse a t C arnegie T e c h . . . 014
Electrica l M i n i n g ... 50
E lectrical W orld ... 31 7 E le c tric ity ; See also ‘‘E q u ip m en t, Elec tric a l” " P o w e r” — A u to m a tic su b sta tio n co n tro l. P e te rso n *401 — A u to m a tic su b sta tio n co n tro l. P a c k a rd an d P o w ers ...*840
— B ritish co lliery su p p lies c u rre n t fo r d om estic use ... 528
— C olliery e le ctrific a tio n in F ra n c e ... 460
— C onserves n a tio n ’s coal p ile ... 302
— E lec trific atio n p ro g ress. B rig h t ... *135
— E lectrified fencing lead s to m a n sla u g h te r ch arg e ... 230
— E lec tro ly te in sto ra g e b a tte ry c e l l 51 — Im p ro v em en ts a t Glen A laen Coal Co. Seem and G ealy ... *593
— L oad ra tio c o n tro l in Belgium ...*352
— P o la ritie s n o t th e sam e on all m ak es o f tra n s fo rm e rs ... 851
— P ro d u ctio n b y p u b lic u tilit y po w er p la n ts, 207. 4 0 8 . 5 19. 7 0 0 , 899 — R eg en erativ e b ra k in g ...*682
— "S te p p in g u p ” c u rre n t ... ‘. ... 731
E ngineering and M in in g J o u r n a l ... 84
E ngineers in in d u s try <e) ... 31.9 E ngineers, m eetin g o f (e) ... 904
E q u ip m en t. A ir — C om pressors, air, sm all u n i t s ... .. . . 216
— C ontrol v a lv e ... *715
— P ro je c to r, p o rta b le cem ent ...*937
— Saw. p o rta b le h a n d ... * 625
E q u ip m en t, E le c tric a l; See also "L o co m o tiv es. M in e" -—A u to m a tic co n tro l ... 8 23. 873 — A u to m a tic reclo siu g c irc u it b re a k e r o b v ia te s overloads ... *470
— B ond w elded to ra il b a se 625, *749 — C ircu it b re a k e r sig n al. E m ig h ... *695
— Clam p fa c ilita te s electric w irin g ...*351
— C om pensator, h a n d ...*317
— C onnection ch an g e sim plifies te stin g . . . *095
— C o n tro ller fo r fine speed ... *283
— C ontroller, w elding ... 249
— D ouble m o to r d riv e o f fa n fo r sm all space ... *471
— D rills, electric, w ith u n iv e rs a l m o to rs . . *249
— E lectrode, w elding ... . 750
— H am m er, electric ... *199
— H am m er, p o rta b le electric ... 419
— H o ist. Lo-H ed electric ... *868
— H oist. U n iv ersal e le ctric ... 3 5 2 — M ereu ry -are re ctifiers ... *143
— M eter. P o rta b le s ta n d a rd ... *833
— M eter ra n g e i n c r e a s e s ... 318
— M eter. T h ree-p h ase fo u r-w ire ... *715
— M oto rizin g steam -d riv en fa n s. W ilb u rn . *847 — M otor, perm issib le ... ...*779
— M otors, B all-b earin g ... *317
— P a n e lb o a rd s. residence ... 867
— P erm issib le b a tte ry e q u ip m e n t. Gealy . . *879
— P erm issib le eq u ip m en t. Ilsley ...*598
— P o ly p h a se s ta to r co n nections checked b y b a ll-b e a rin g te ste r ...*403
— R ange sw itch e s ... *833
-—S a fe ty ru le s ... 89
— Saw ing m ach in e. W olf ... *625
— S im p licity in new m o to r ... 4 5 4 — Soldering iro n efficiency. E l e c t r i c *402 — Solder p o t. electric ... 386
— Speed red u cers, F a lk ... *555
— S ta n d a rd device n u m b e rs ... 504
— S ta rte rs re q u ire care. A cro ss-th e-lin e. . . . 46
— S w itc h b o a rd accessible. M ak in g ... *471
— S w itch b o ard panels. Steel ... 660
— Sw itch, cam ty p e lim it ... *101
— Sw itch, h an d -o p erated oil ... *369
— Sw itch. In terch an g eab le d ru m ...*488
— Sw itch, sm all sa fe ty ... 42 0 — Sw itch. 2-pole. 3-w ire ...*800
— S y nchronous m o to r g e n e ra to r set fo r a u to m a tic o p eratio n ... *778
— S vnero v erter-self co n tain ed c h arg in g u n it *284 — T est m eter, p o rta b le (e> ... 353
— T 'm e-releuse device fo r com p en sato rs. low v o ltag e ... *3S5 — T u rb in e u n its, b ack-geared ...*521
— V ariab le speed red u cer ... 48 7 E q u ip m en t, m ine (e) ... 388
E q u ip m en t, p ro g ress to w a rd s tu rd ie r and perm issib le types. G ealv ...*143
E q u ip m en t— Scrap p in g th e o bsolete (e ) . . 30
E u ro p ea n coal dilem m a analyzed ... 887
E x p lo slb ility sem i-a n th ra cite ... 86
E xplosions — C entral P o c a h o n ta s Coal Co. , , 20 7 . 479. 738. 7 9 t -— C onnellsville B y-P roducts Coal C o...203
— D elagua m ine, V ictor-A m eriean F u e l Co.. 82 1 . 927 — E h ren feld . P en n . Coal & Coke Co. *510. 581 -r—E V erettville. N ew E n g lan d F u el & T ra n s p o rta tio n Co...6 4 8 . *702. 856. •8 8 2 . ie l S09 -r—F ran cisco m ine ... 270
— Gl^n Alden Coal Co.. T ruesdale. 6 5 0 ; W oodw ard ...821. 855. 928 — W illcrest— R ice re p o rt ... 306
— Ilsle y Coal Co. ... 2 0 3 Pag'd E x p lo sio n s— C ont’d. — M ajo r d isa ste rs in U. S. 1926 ... 112
— M arine colliery , W ales 37 1 , *406 — N ew born m ine ... 40 9 — R ock wood ex p lo sio n . E d w a rd s ... *8
— Oxygen in a ir below 5 p e r c en t to p re v e n t ex p lo sio n s ... 725
— Saline C o u n ty C oal C orp. ... 511
— T e st a t E x p e rim e n ta l m in e ... *849
— W in ch ester tip p le ... 791
E x p lo s iv e s S ervice B u lle tin ... 504
E x p lo siv e s; See also " B la stin g ” — C onsum ption a t c o al m in e ... 784
— D y n am ite w ill ig n ite coal d u s t ...*231
— L iq u id oxygen speeds s trip p in g . H olderer. • 4 7 9 ; D iscussion. B a ra b ... 720
— T e stin g p h o to g ra p h ic a lly ... 4 3 5 — T ongs sim p lify d u m m y m a k in g ... *504
— U se an d m isu se (e) 456
P ag e F a n s and B lo w ers; See »Iso " V e n tila tio n ” — A u x ilia ry v e n tila tio n (e )... 35
— B low er fa n a t a n th ra c ite m in e ... *41
— B o o ste r fa n s, D an g ers o f u s in g ...*538
— E x h a u s t fa n w ith p ro je c te d i n l e t *101 — D ouble m o to r d riv e fo r sm all sp a c e . . . . *471
— F a n connected to h o is t d ru m serves as b ra k e ... *368
— M o to riz in g stea m -d riv e n fa n s . W ilb u rn . *847 F a ta litie s — B ased on d a y s w o rk ed ... 356
— C auses and s ta te s . . . .2 7 2 , 340, 476, 614, 822 — Coal fa ta litie s 19 2 6 . T u r n e r ...*111
— E x p lo sio n s 20 3 . 20 7 . 371. 510. 5 11. (»48. 650. 738. 821 — Gas k ills rescu e men ... 511
— Illin o is ... 341
— O h;o 19 2 6 re c o rd ... 58
— U n d erg ro u n d . H a rrin g to n ... . . 535
F e d e ra l in te rfe re n c e n o t n e c e s sa ry 393 F e d e ra l m eddling in b u sin ess l i f e ... 238
F ed eral T rad e C om m ission — A dvisory p ow ers u rg e d b y M r. H u n t . . . . 7 8 3 — B locked in b re a d an d flo u r c a s e . . 623
— M cCulloch, E . A., n o m in a te d 175. 2 3 8 — M ay n ard case ...6 48. 713, 737. 9 2 3 — P o licy u n c h an g e d b y C laire F u rn a c e de cision ... 623
F ilte r, c e n trifu g a l, c o n tin u o u s ...*219
F ilte r , oil ... 28 4 F in a n c ia l — B an k e r looks u p o n coal in v e stm en ts. C assatt ... 109
— Bonds. M o n treal Coke & Mg. Co...825
— Bonds. S h eridan-W yom ing ... 371
— D ividends. Coal c o m p a n y ...26. 59. 92. 27 4 . 377, 44 4 , 44 5 , 740. 892 — H udson Coal bo n d i s s u e ... 852
— LehigV Coal & N a v ig atio n Co. n e t incom e 309 — P it ts b u r g h Coal Co. lis t sto ck on E x ch an g e ... 928
— R e o rg a n iz a tio n B ritis h E m p ire Steel C orp... 893
— R ep o rts, coal co m p an y . .2 7 3 , 274, 275. -106, 5 12, 616. 65 0 . 700, 74 0 . 741. 7 91, 824, 892 — S to c k sp lit u p Isla n d C reek C oal C o.. 177. 203 F ir e engine, u n d erg ro u n d c h e m ic a l... *774
F»re e x tin g u is h e r on ra ilro a d c a r ... *230
F ire p re c a u tio n s a t C olum bia. U t a h ... 526
F ire p rev e n tio n en g in eerin g ( e ) ... 801
F ire p ro te c tio n (e)... ... 489
F ires — B rad y -W arn er Coal Co. seals Osage No. 1 582 — Cool S p rin g Coal Co. tip p le . ... 610
— C ry stal B lock M in in g Co.. tip p le a t G ates 741 — E d ito ria l ... 557
— E lm G rove M in in g Co. tip p le ... 92
— F a ir Coal Co... 512
— F ran c isco m in e ... 2*0 — G ates m ine. T i p p l e ... 791
— Hn^.le B ro o k Coal Co. b r e a k e r ... 824
— H igh S h a ft tip p le ... 91
— Iw a k i colliery, J a p a n ... 788, 890 — -Maple R u n Coal Co... 2 *2 — M arion C o u n ty Coal C o ... 375
— P itts b u rg h . V irg in ia & K en tu ck y Coal Co. 207 — R ic h lan d Coal Co. t i p p le ... 92
— S ealing u n d erg ro u n d fires in W e s t...*257
— S h o rt C reek Coal Co.’s g en eral s to re . . . . 58
— S u m m itt Coal Co. . ... 242
— T h irtv -y e a r fire. S u n d a y C reek Coal Co. ex tin g u ish ed ... 54
— W h at m ak es coal p illa rs b u rn . C o o p e r .. *811
F ir s t A id ; See a lso "R escu e W o rk ” — A dvanced tra in in g to Colo, o fficials 24 — A l a b a m a ... 39 7 — Crew Sax to n Coal Co... *11*
— In te rn a tio n a l c o n t e s t ... 6-*7 F la s h lig h t, p e rm issib le e le ctric ... 7.82 F lo o r g r a tin g f o r p o w er s ta t io n s ... 3 " 1 F o ss succeeds C aldw ell ... 23
F o u n ta in , d rin k in g . ...*569
F ran c e — C o n su m p t’on. coal ... 38 *
— E lec trific atio n , colliery ... 460
— E x p o r ts 'a n d im p o rts, coal and co k c. .6 6 . 24 8 . 3 8 4 , 418, 520, 658. 832 — In d e m n ity fu e ls ... 248. 418. 9 3 6 — L ig n ite d ‘sM llation . ... 874
— N u m b er m in ers ... . 55 4 — P rice s, coal ____ 32 , 31 6 . 350. 45 2 , 520, 55 4 . 5S8 — P ro d u c tio n coal, coke a n d lig n ite . . . .8 8 , 2S1. 384. 477, 55 4 , 624. 748, 936 — R eview coal in d u s try . . . . 155. T r u a n t . . 171
— U nem ploym ent, d e c r e a s e ... . 71 4 — W a g e s ... 55 4 . 588 P ag e F r e ig h t R u le s — A la b am a h e a rin g ... 371
— A n th ra c ite r a t e c u t to n o rth e rn N. Y . . . 372
— A n th ra c ite re d u c tio n to R o c h e s te r 888 — B y p ro d u ct coke a d ju stm e n t attacked-. . . . 553
— C en tral F r e ig h t A ssn.— h e a rin g p o stp o n ed 238 — C hicago zone a d ju s tm e n t ... 553
— Coke ra is e in ra te s su sp e n d e d ... 300
— D ocket d e c i s i o n s ... 23 , 23 8 , 3 06. 498 — E lk v ille , 111., ra te s u n j u s t ... 238
— L a k e carg o coal c u t . . . : ... 85 2 — L a k e Cargo h e a rin g s 53, 2 7 1 . 81 6 — L ig n ite a d v an ced ... 92 3 — M in n eso ta ... 48 5 — M ississippi V alley re v isio n o rd e re d 821 — N o rth D a k o ta ra te p r o b e ... 553
— Ohio a sk s lif tin g r a te d is c rim in a tio n . . . . 372
— O hio A ssem b ly c u ts r a te to L a k e s 21 3 — P e n n sy lv a n ia ra te s fro m W. V a. to Dint. o f C olum bia u n j u s t ... 408
— S t. L o u is a n d E a s t St. L o u is. . . . .3 4 0 , 888 — S’o u x C ity ... 23
— T id e w a te r to F itc h b u rg . M ass... 238
— W est V irg in ia m in es w in fig h t on C in c in n a ti ra te s ... 553
— W ider d ifferen tial to re v iv e B altim o re tra d e ... 204
F u e l, efficiency in u se b y u tility pow er p la n t ... 4 4 2 F u tu r e . G andy en visages a p ro s p e ro u s 725 G allow ay N o. 15 n r n e ... 15
G am b lin g in c o m m o d itie s ... 89
Gas — B itu m in o u s lu m p c o al m a k e good g a s. . 331
— C ity gas. A m erica s u rp a ssed b y E u ro p e in 231 — C om plete coal g asificatio n p roduces gas and a sh ... 634
— F a c to rs in g as te m p e ra tu re s ... 501
— H ydrogen fo r m a k in g a m m o n ia . 929 — K re isa g a sific atio n p r o c e s s ... 427
— L o n g d ista n ce p ip e lin e fo r G erm an y . . . . 731
— R e frig e ra to r o p e ra te d by gas. h o m e 300 — R eview gas m a n u f a c t u r i n g ... 28 7 Gases, M ine — D etector, firedam p ... *258. 365 — M eth an e and carb o n dioxide in m ines. C ornet ...*253
— R eco rd in g devices, a u t o m a t i c ... 690
G asoline fro m lig n ite ... 681
G ear, p o sitiv e-d riv e c h a n g e ... *33
G ear u n its, single r e d u c tio n ... 4 8 7 G eological S urvey, 17. S. — A p p ra isal l a u d e d ... 848
— Coal co n su m p tio n p u b lic u tilitie s U. S.. 65. 408, 51 9 . 700 — Efficiency in u se o f fu e l b y p u b lic u tility p o w er p la n ts ... 4 4 2 — P u b lic U tilities, c o n su m p tio n o f coal and p ro d u c tio n e l e c t r i c i t y 26 7 . 40 8 , 51 9 . 700, 899 G erm any — E x p o rts and im p o rts ...99. 452 — Gas p ip e lin e. L o n g d is ta n c e ... 731
— In d u s tria l w e alth based on c o a l... 647
— L ig n ite ... 31
— L ow te m p e ra tu re d is tilla tio n ... 681
— P o w e r co n tro l a t H agenbeck m in e *891 — P o w e r p la n t a t H agenbeck m in e ...*825
— P ro d u c tio n ... 99. 47 7 . 658 — R ock d u s tin g co m p u lso ry . T ouw aide. •328.- 570 — R u h r w o rk in g h o u rs c u t ... 658
— T u rb o -e o m p ro sso r a t S tin n es m in e . . . . *892
G oggles p ro v e th e ir w o r t h ... 643
Gnszirles replace g lass. W ire ... 102
G ov’t a ttitu d e b ro u g h t p ro s p e rity ... 4 0 4 G ov ern m en t co n tro l co al in d u s tr y ... 595
G ov ern m en t co n tro l pow er. G reen o p p o ses. . 935
G rease. S oapless ... 2 1 0 G reat B rita in — A n ti-strik e bill ... 73 6 , 923 — A rc w elding, T u p h o lm e ... 929
— C arlto n M ain C olliery Co.— F e ic k le y p la n t *4 6 8 : S u p p lies c u rre n t fo r d om estic u se ... 528
— C om pensation c la im a n ts ... 844
— C ory B ros. & Co. ch arg ed w ith m a n s la u g h te r ... 236
— E g y p tia n S ta te R y s. give London e x p o r te rs o rd e rs . ... 99
— E x plosion a t M arin e co lliery W ales. 3 71. *400 — E x p o rts and im p o rts . . . . 1 70, 281. 316. 407. 5 8 S, 74 8 , 8 00. 93 0 — G eneral s trik e to g et c rim in a l b a n . . . . 340
— Hodge resig n s from M iners In te rn a tio n a l. 85 3 — In d u s try h a rd h i t bv s trik e : T u p h o lm e , 170 — M erger a n th ra c ite c o llie rie s ... 40 5 — M iners’ un io n u n d e r C o m m u n ist c o n tro l. . 704
— M o rris C ollieries L td ., o rg an ized to ch eap en p ro d u c tio n ... 3 3 8 — Pease. B eau m o n t, r e m a r k s ... 370
— P o ssib ilitie s o f c o -o p erativ e sellin g dis cussed. W o o to n ... . 3 3 9 — P o w e r p ro d u c tio n an d u tiliz a tio n a t g ro u o s o f c o llie rie s ... *468
— P ro d u ctio n , c o a l... 28 1 , 47 7 — R esearch B oard recom m ends u n d e rg ro u n d su p p o rt im p ro v e m e n ts ... 839
—-S afety re sea rc h s t a t i o n ... 887
— Sm okeless stea m w a g o n ... *611
— S p o n ta n e o u s co m b u stio n in co al s e a m s .. *811
— S trik e , gen eral, n e a rlv s u ic id a l... 174
— T ech n ical p ro g ress affected b y su sp en sio n . G reenw ald ... 15 4 — W age scales ... 170
— W ard ley p la n t o f B irtley Iro n C o . . *358
G un, sp ra y ...*749
