With Which is Consolidated The Colliery Engineer
DEVOTED TO THE OPERATING, TECHNICAL AND BUSINESS PROBLEMS OF THE
COAL-MINING INDUSTRY
1SSUED WEEKLY
YOLUME XXVI
July 1 to December 31, 1924
McGRAW-HILL COMPANY, INC.
lOth AVE. AT 36th ST.
NEW YO RK
W -
COAL AGE With Which is Consolidated The Colliery Engineer
INDEX TO VOLUME XXVI
Ju ly 1 to December 31, 1924
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/ ^ / OQ
o'9
NOTE— The articles and references in thia index have been classified under leading sub- jects or topice, as fa r as practicable, and shoUld be 60Ught under such heads, which together w ith all unclassified matter are arranged alpha- betically. Illustrated articles or cuts standing by themselves are indicated by an asterisk ( * ) . A ll editorials appear under th a t subject. each having its exact title. Elsewhere the subject matter of an editorial w ill be found classified and marked (e ). M any titles of articles are abbreviated, the aim being to grive prominence to im portant words.
Follow ing is a list of the pages included in each issue of the volume, together w ith date and num ber of the issue. for convenience of ref erence:
No Pp.
Ju ly 3 1
...
10 2 ... ... 35-68
** 17 3 ... ... 69-106
" 24 4 ... ... 107-138
“ 31 5 ... ... 139-174 Aug. 7 6 ... ... 175-208 14 7 ... ... 209-244
44
21 8 ... ... 245-280“ 28 9 ...
Sept. 4 10 ... ... 317-352
" 11 11 ...
•* 18 12 ... 389-424
“ 25 13 ... 425-460 Oct. o 14 ... 461-496
44
9 15 ... ... 497-53244
16 16 ...44
23 17 ... ... 569-60444
30 18 ... ... 605-638 Nov.44 44
13206 20 ... ... 675-70821 ... ... 709-74244 27 22 ... 743-780
Dec. 4 23 ... ... 781-816 44 11 24 ... ... 817-854 4* 18 25 ... ... 855-890
44
25 26 ... ... 891-926Page Accident*. See also “F atalities”
— Falls and other causes; tables... 12
— Old men more subject to accident... 22
— Reporting mine accidents ( e ) ... 36
— F atalities fo r May, classified; table. . . . 53
— Prevention work spreads in P e n n a ... 53
— Coal-mine accidents, U. S ... 192
— Haulage accidents rank second to roof falls ... 225
— Fire in Lincoln mine. Ohio ... 300
— A ir blasts from fa llin g roof k ill miners. . 326
— Johnstow n (P a.) flood, 1889, surv iv or. *338 — Disasters, 1910-1924 due to electricity; t a b l e ... 434
— Care in choice and keep of fuse and s w it c h e s ...*468
— Precautions to avoid accidents ... 471
— Coal m ining vs. other industries (e) . . . . 497
— Frequency and severity rates in indus- triee; tables, 513; Causes of temporary in ju ry ; table ... 514
— By causes and states, Aug., 1924; tabie. 519 Mine-haulage accidents fa r too frequent. . 557
— Clock showing lost-time accidents... 585
— Few mine accidents under Pinchot regime 622 — B um ps cause accidents in Johnson colliery*641 — September report, Bureau of M ines... 659
— Three accidents in starting locom otives. . *663
— M iner loses tw o thum bs from one h an d . . 838
— F a ta l cave-in, Springfield mine. N. S. . . . 841
— More numerous in m orning; roof hazard greater ... 844
— Few accidents in Mexican m ines... 894
— N unnery m ine accident, Sheffield, E ng . . 905
— Boy burned by powder found in m ine. . 912
— Addy Co. m ay reorganize, C in cin n a ti. . . . 372
— Aerial tram w ay solves rock disposal prob lem ... *363
— A ir blasts from fa llin g roof k ill miners. . 326
— A ir condition as to temperature and mois- ture (e) ... 389
— Air-lift and Japan mines interest an thra cite e n g in ee rs... 799
A lab am a — Mobile Chamber of Com. protests coke rates 351 — O utp ut and value of coai 1923; table. . . . 410
— Coal seams, output, analyses, etc., *473; Typical eection ... ...*540
— Production, W arrior, P lateau and Coosa fields, table. 475; Cahaba field, table and map, 476, *539, 797; Geologie sectione, 477; Analyses and fusing tem p’8 o f ash. table ... 478
Page Alabama— Continued — Coal-washing and cleaning practice makes good coke ...*501
— Progress in coking coal ...*506
— Coal-mining methods vary w idely... *509
— Details of m ining the coal beds, *537; O utput per m an, per day; ta b le ... 540
— Eąuipm ent and safety m ethods... *577
— Bla9t furnace, Tenn. C., I. & R .R . Co., Ensley ... *587
— Birm ingham , Plan better handling of coal 637 — Jacksonville agreement setback to union fields ... 729
— Marvel plant largest in Cahaba field, •796; A labam a coal fields and m a p .. *797
Alaska — Bureau o f Mines studying A laskan coal. . 402
— M atanuska coal field, 7,000 tons m onthly; Geol. Survey c o m p le te d ... 896
Analyses — Ash analyses in cleaning coal; table. . . . 219
— Coal, Deep River field, N . C.; ta b le ... 394
— Water, type of analysis depends on use. . 399
— F lotation test, ash content; tab le ... 503
— Bayview mine (A la.) washery tests; table 504 — A nim als in mines cause infection... 46
Anthracite — Wages rise faster than other industries. . 158
— Operators to teach public heating by smali sizes ... 191
— Operators violating the law. no evidence of ... 193
— Circular prices for August anthracite;table 232 — Pulverized anthracite slush burned in power plant ...*253
— Mines shut down aw aiting orders and cars 263 — Production by breakers, washeries and dredges; table ... 265
— Big merger of independents planned ... 298
— Safety inspector urged for each colliery 337 — New Tempie A nthracite Coal Co. formed by merger ... 371
— Circular prices for Sept... 373
— Canada seeks substitute for U. S. anthra cite ... 374
— Shipments, 1923, tonnage and value; table 376 — Sproul interests effect new anthracite merger ... 411
— Colonial Colliery Co. absorbes Madeira Natalie and Greenough operations. . . 443
— Circular prices for O c to b e r ... 480
— Mines flooded by rain sto rm ... 517
— Two mine fires w ithin few days . . . . 554
— U. S. operators yisit European m ines. . . . 623
— Six coal firms to consolidate... 624
— O utlaw strike of anthracite m iners... 626
— Analysis of coal, Dunmore No. 3 bed; table ... 643
— Sproul consolidation about complete. . . . 662
— Semi-coke to supplement anthracite. . . . 687
— Inspection tour of magnates deepens in terest in merger ... 694
— Storage plant, H udson Coal Co., Jermyn, P a ... *813
— Circular prices fo r December... 839
— Supreme Court holds tax constitutional. . 840
— Seek greater mine safety... 876
— Economy service traveling show ... *887
— Miners w ant coal tax repealed... 914
— Strike end expected ... 914
— W arriner resigns from Conciliation Board 914 — Appraisal organization aids all property. 328 Arkansas — O utput and value of coal, 1923; table. . 410
— Coal-mine statistics, 19 23... 876
Associations — A m . Assn. of Etigrs. pledge aid to Presi- dent ... 374
— Am. Chem. Socy.: F ali convention, Ithaca, N. Y ., 121; To discuss coal storage ... 263
— Am. Emg. Council urges coal storage. . . . 52
— Am. Inst. Mg. & Met. E ngr.: Arrange program for B irm ingham meeting. 20; Visit southland; Tour and banquet, *582; Visit Illin o is coal m ines... 662
— A m . Mg. Congress: Standardization con- ference. 411; Discusses coal situation. 547; Names tax com m ittee... 727
— Big Sandy Coal Assn.. N . E. Ky., combats discrim ination ... 626
— Bit. Coal Operators Assn. asks readjust- m ent o f union contract ... 692
— Brotherhood Investment Co., W . V a. . . 54
— Central Penn. Bit. Coal Operators and Producers Assn’s. jo in t meeting to boost o u tp u t ... 371
— Civil Liberties Union, move to protect miners ... 299
Page Associations— Continued — Coal Mg. Inst. of America: Pittsburgh meeting planned. 552; Balloting for officers, 624; Advance program, (e) 676; Holds post-graduate course, (e) 743; Discussions at Pittsburgh meet ing ... *819
— Colo. and N. Mex. Coal Operators Assn. asks revised coal rates ... 315
— Eng’s Club of Scranton, discussions. . . 799
— E n g ’s Socy. of Western Penn. discuss rock dusting ... 799
— Federal Trade Com. report on dock char ges ... 517
— Illinois Mg. Inst., 3-day cruise on Mississippi ... *19
— Joseph A. Holmes Safety Assn., 45; Grows rapidly ... 864
— Monongahela Coal Assn. seeks cut in Baltimore scalę ... 122
— N atl. Coal A ssn.: Appoints com. to reduce waste, 160; Forms research com., 481; Urges use of soft coal. 554; Authorizes research program. 588; W ill strive to bring public and operators closer together. 589; Names com. to U. S. Chamber of Com., 592; Cost accounting and tax com. named, 626; Discontinues “Coal Review,” 875; (e) ... 891
— N atl. Elec. L igh t Assn., Report of Prime Movers Com ... 686
— N atl. Industrial Conference Bd. sees end of slump ... 230
— N at’l. Mnfrs. Assn. decries quick reme- dies; Officers elected ... 912
— N atl. Purchasing Agents Assn. estimate coal supply in storage. 442; Report stocks inerease ... 624
— N atl. Safety Council: Calls meeting at St. Louis. 42; A nnual meeting; tenta- tive program. 300; Completed program. 339; Opening session, 482; F u li report of congress ...*513
— New Y o rk State Coal Merchants Assn. hołd big convention ... 376
— Northwest Coal-Dock Operators Assn. u n fa ir methods ... 517
— Pittsburgh Coal Producers Assn. want rates cut ... 300
— Pittsburgh m ining institute may be formed ... 765
— Proposed coal institute regarded unfavor- ably ... 552
— Royal Com. on M ining Subsidence. 508, 557 — Rocky M t. Coal Mg. Inst.. Rock Springs meeting ... 227. 258. 289 — So. Wales Inst. of ETngrs. discuss bitulo id. 691 — Trade assn’s; Officials confer on status. 443; Hoover silent, 517; Assn’s. to study unifo rm cost accounting, 592; R u lin g asked on a c t iv it ie s ... 803
— W . Va. Coal Mg. Inst. meeting, 835; Photo. *875; Gary trip ...*877
— W . Va.-Ky. Assn., E ng’s. plan program, 802; Discuss problems and experiences. 907 Austria — Coal output g a i n s ... 21
B — “ Bacon and beans” ... 159
— Banker vs. promoter. N arrow ing g ulf between ... <... 327
— 'Baum jig and washer . . . . . ... *177
— Bearing w ith rollers tapered to meet thrust ... . . . . * 3 8 7 B^lgium — Campine region coal field discovered *247 — Campine m ining villages like garden cities ...*283
— W interslag improrem ents ...*284
— Coal miners strike against wage cut . . . 300
— Benzol, B ritish govt. to study ... 370
Bids — N avy Dept. asks bids at So. Brooklyn. 300; Keen competition ... 337
— N. Y . City Dept. many bids. wide rangę 589 — New Haven R .R . seeks bids, 695.839; Opens bids ... 878
“B itulo id” as dust layer. British ex- periment. 615; Discussed at C a rd iff. . 691
— Black powder, See “ Explosives” — Black Servant Coal Co’s. (111.) strip pit, *319 Blasting. See also “ Exploslves” — D rilling shotholes in coal face ... *38
— Short fuses; Inserting detonator; storage; etc... 161
— Should air space be used w ith black powder? ... 164
— Misfire m ay be caused by uncleaned shothole ... 267
4
C O A L A G E Vol. 26
Page B lasting— Continued
— B ritish m ake near safety rules ... 447
— Square dealing in company shooting, (e) ... 461
— D rilling shot hole9, *574; Loading a hole... ...*575
— Dangers in elec. blasting. *574; Rules in blasting, 575; Strength of safe cur- rent ... 576
— Vertical shearing saves powder ... *607
— Coal face shot down, *609; powder per ton of coal; table ... 609
— B ritain revises shotfiring rules 646 Boilers, and Furnaces — Resurfacing seats of tube-hole cove.. a . . *194 — Anneal boiler tubes before roli them . . . 195
— Cross-section of boiler and furnice, Lykens, P a ... *254
— Six boilers served by one stack... 257
— Stoker for sm ali boilers ... *280
— Burning screenings smokelessly ... *280
— Device to keep water at fixed level . . . *315
— Bentube evaporators prevent scalę and keep clean ...i ... *315
:— Hopper-feed hand stoker, m any advan- tages ... *386
— Scalę h arm ful. 399; Cost of 3cale accumulation, *400; Effect of dif. im purities in feed water and remedies; table... .. . 402
— Seek better refractories fo r fum ace lining ... 438
— Turbo-undergrate blower ...*460
— Powdered-coal furnace no longer an ex- periment; Yearly increase in area of heating surface; diagram. *720; Typical powdered-coal fired b o ile r. . . *721
— Boiler economies fo r coal men exhibit at power show ... 864
Book Notioes — Practical Calculus for Home Study; Palmer ... 13
— “Coaldex,” Pam phlet, H. E. F rie n d ... 183
— Resistance of Entry to Air. Bureau of Mines ... 286
— “Pulverized Fuel.,” W. F. G o o d r ic h .... 414
•— “The Coal Industry,” A. T. Shurick. . . . 414
•— “The Price of Coal,” Shinwell, L ondon. . 438
-—“The Amer. Socy. Htg. and Ventg. Engrs. Guide, 1924 ... 450
r —“ Byproduct Coking,” Cooper and Myers 450 — “Coal Review” discontinued. . . .875; (e) 891 Breathing apparatus, See “ Rescue Work. M ine” Briquets, See “Fuels” Buildings, See “ Headframes and Tipples” ; “M ining Towns and Housing” B ulletin board for mine yard ...*358
Bum ps and shocks working pillars, *641, 750 Burean of Mines -—Feehan, safety commr. indorses elec. cap lampa ... 56
— Plans further co-operation w ith B ritis h . . 93
— Testing gallery for electrical devices. . *223 — Investigates stream pollution by mine waste ... 229
— More speed in testing urged ... 232
— Investigation of mine resistance to air. . 286
‘— Study W ashington and Alaskan coals. . . 402
— Study washing of Freeport (P a.) coals, 430 — Elec. equipment approved, L ist o f . . . . 434
— Seek better refractories for furnace linings ... 438
— Engineer reaches mine disaster v ia air* m ail seryice ... 483
— Electrical equipment investigations, (e) 533 — “Miners’ circulars,” (e) ... 781
— Budget allowanee lowered ... 839
— B a in ’s annual report ... 877
0 Cal i f orni a — M ining Congress, Sacramento convention, 547 Canada — Peace River (B. C.) coal alm ost equals • W . Y a ... . . . . ---- . . . 18
— Two provinces as coal supply . . . 22
‘— Vancouver coal fields hard to work and lim ited ... .. ; 120
— Low-grade lignite9 a problem ...156
'-— A lberta strike not settled ... 231
— Slum p in coal o u t p u t ... 232
— H udson’8 Bay Co. entered coal business \ in 1852 ... ... . - i 264 — Shock attack on U. S. coal delayed ■*.... 265
Dom inion Coal Co. plans eąuipm ent financing ... ». . . 336
■— A lberta Conciliation Bd. urges $5 scalę, 338 Seeks substitute for U. S. anthracite. . 374
— A lberta miners again refuse 12% % cut, 410 — A lberta coal cannot go east ... 411
— Im ports o f B ritish coal d e c lin e ... 440
'— X7. S. coal shipm ent9 decline ... 481
:— A lberta mines not likely to open. 520; Soon to open ... ... 620
:«— Alberta, m ak in g briąuets from coal dust formerly wasted ... 544
— Western Canadian miners accept wagę cut ... 553
— N ova Scotia, P lan of m ining coal >ed. *558 — American markets vs. Canadiar coal. (e) ... 569
— Govt. to aid coal shipments to central i districts ... .591
— Cassidy, B. C., Old w ork9 flushed with fine rock ...■... *654
— Western miners work after cloee vote to end strike ... - 661
Page Canada— Continued — Coal deposits not central. Ł(e) ... 710
— A ugust coal o utp ut lowest o f year . . . . 7^8 — N ova Scotia bum ps due to p re s s u re ... 750
— N ova Scotia miners to dem and higher wages ... • ... . . . 804
— Springfield mine. N . S.. fa ta l cave-m. . . 841
— Miners vote to form own u n io n ... 841
— Spread of central heating system foreseen ... §£5
— September coal o u tp u t ... — New wage contract and miners’ assn.. . 87b Cars QO — Wheel w ith double tre ad ... .. *o» — Swivel mine-car hitching should ^e lubricated ... — Builds 2-ton mine car in 5 h r... 154
— Sprinkler car wets roof, ribs and floor ... *267
— Car designed fo r safe transport of hay. -*292 — Saving time in gathering mine c a r s . . . . *306
— D um p car operated by steam from locomotive . . . . ... ... 351
— Rock-dusting car ... 411
— Rock-dusting car, Sprmgdale mine. Logans Ferry. P a ... 557
— W hite coal car, U. S. F ue l Co.. Salt Lalce City. U ... ...*573
— Mine car b u ilt in less than 3 % h r ... *714
— Specially designed car for rock. clay. etc... ... • • • *844
Carnegie Inst. to train graduates at mines, 832 Castlegate mine disaster, Recovery w o r k .. 323
Canca Valley coal convenient to P anam a. . 798
Cement . _ 0_ — Cement m ortar prevents dust lodgm ent. . *785
Cinderella miners b u ild swim m ing pool. . *362
Clearfield Bitum inous Coal Corp., Foresta- tio n ... *124
Closed door. The ... ... 90
Coal. See also “ Production” — Oil vs. coal. (e) ... 2
— Cure for “coal baronism ” ... 16, 52 — Im ports at Rio de Janeiro, U. S. exceed B ritish ... ... 19
— Consumption in coking ... 20, 122 — O utput of Russia m i n e s ... 21
— Dock shipments decline ... 21
— A ustrian o utp ut gains ... 21
— Heating value of coal burned, (e) . . . . 35
— Competition w ith fu e l oil, 50; Coal cheaper ... 51
— Consuming p ublic vs. coal operators, (e) ... 70
— Exports and imports decline ... 122
— Consumption by Utilities ... 123
— Freakish coals in Scotland ... 128
— Selling fine coal, (e) ... 139, 191 — Regulating “K ing Coal” ... 144
— Hydrogenation of coal to obtain o il. . . 156
— Low-grade lignites in Canada... 156
— Powdered coal efficient... 156
— Storage of coal urged by H am m ond. . . . 158
— “M ount 01ive” coal ruling ... 160
— Waste in use of soft coal. To reduce. . 160
— Statistical inform ation needed in coal depression ...i ... ... 190
— Consumption in power production drops, 193 — R atio volatile m atter to total com- bustibles; table, ... 197
— Leadership in purchase of coal, (e) . . . . 209
— Business im proving; W ooton ... 230
— Utilities more efficient in use of coal. . . 231
— Ocean carriers revert to use o f coal. . . . 231
— W hen coal is gone, w hat is to be done? 252 — West Va. smokeless coal brisk operation 6 mos... ... 265
— Coal-stock report to com e... 298
— Production on competitive basis needed. . 299
— Five-ton błock o f coal as war m em oriał. . *300 — Brown coals useful as fuel ... 329
— Lignite, Darco, a boneblack, new product of ... 334
— More coal statistics needed... 335
— Consumption, 1923, Dept. o f Com. report ... 337
— Heating in storage. Conditions favorable to ... 366
— Engrs’ com. report coal shortage unlikely ... 372
— U tility coal consumption hits bottom . . 375
— Exports U. S. and Grt. B ritain; table. . 375
— Analysi8, 4-ft. seam, Deep River field, N. C.; ta b le ... 394
— Consumption less, owing to high price. . 396
— Origrin and form ation, Theories o f . . . . 404
— Coking coals vary in structural strength, 406 — Resources ample for many years. (e) . . 425
— Keep cool w ith coal, ( e ) ... .. 426
— Tar yield o f Western lignites... 433
— Analyses of A labam a coals; table. . . . 478
— Storage vs. coking of screenings, (e) . . . 497
— Consumption in various industries 590, 591, 624, 626 — Big chunk mined ...*617
— Coal balls, “finger prints” that identify coal ... *656
— "Back to coal” in oil heating plant. . . . 658
— Campaign fo r clean coal: Ohio engrs’ report: Base-grade analysis sought. . 661
— Bone-coal problems, (e) ... 710
— Pulverized coal. Growth in use o f . . . . 721
— Analysis of Lower K ittaning coal: Upper Freeport bed. 723; Pittsburgh bed. . . . 724
— Heating values, Relative percentage. coal, oil and gas: tab le ... ... 767
— Club fo r purchase of winter supply in spring, (e) ... * ... 781
— Consumed in various industries. . . .8 0 0 . 912 — O utput and value from Ohio mines. 1923, table ... ... ... 840
— Low-ash b itum ino us coal ... 870
Coal cutters. See “M achinę Mining*' Coal Industry. See also “ Tratfe” Page Need of trade assn’s... -. . . . 14
— Coal industry progressive, (e) ... 317
— H istory o f American m ining lacking, (e) ... 318
— Banker vs. promoter, Narrowing g ulf between; Financing m ining proposition, 327 — Car shortage may catch tardy coal buyers ... 336
— American methods efficient, (e) ... 353
— Shop eąuipm ent past and present, (e) 354 — Irregularity originates in other industries, (e) ... 354
— Coal barons have no primrose p a th . . . . 374
— N ation using less coal finding price too hig h ... 396
— Coal comp’y raises m ilk, as side lin e ..* 3 9 6 — “The Coal In dustry ,” Shurick . . . .414, 444 — In d ian a move to patronize house indus try ... 482
— Accident record vs. other industries, (e) 497 — Needs to be let alone, (e) ... 534. 547 — P u b licity as a business policy. (e) . . . . 569
— Low-priced fuel m arks industrial advance (e) ... 570
— Soft coal vs. fuel oil ... 588
— Coolidge decries federal control ... 590
— Learning facts in other industries, (e) 639 — Need of greater publicity, (e) ... 676
— Many fields. Trent process opens ... 716
— “ Soft-coal industry benefits consumers.” Coolidge ... 726
— Central Pa. mines show new life ... 728
— W eak m arket condition met by big equip- m ent ...*751
— Is industry b lin d to health hazards in mines ... *757
— Seeks to curb opening new mi nes. . . 800
— Warns against coal profiteers in New Y o rk ... 801
— Brotherhood of Locomotive E ngr’s in coal business, (e) ... 818
— Child labor smali, (e) ... 818
— Safer operation and cheaper coal . . . . 822
— Effect of Jacksonville agreement... 837
— Coal organization largest in years... 839
— Stabilizing the industry, (e) ... 855
— Need of accurate o u tp u t figures ... 874
— British industry prosperous in 1923. . . 875
— Hoover peace vs. Penn. m in in g ... 912
Coal M ining — Better methods presaged by program to save tim ber ... 804
— Waste in the m ining of coal, (e) Ł . . . . 856
— Twenty-four men load 289 tons daily. . 861
— Progress in underground transportation. (e) ... 891
Coal Storage — Solution o f nation’s coal problem ... 52
— Amer. Engr. Council com. study problem 433 — Estim ate 46-das. supply, Purchasing agents ... 442
— Domestic storage aids industry. (e) . . . 462
— Screenings, Seasonal Iow price, (e) . . . . 497
— Only adds to c o n g e s tio n ... 547
— Banks to finance storage ... 591
— Commercial stocks on hand increase . . . . 623
— Engineers’ report ready ... 764
— Purchasing agents report more coal being stored ... 801
— A nthracite storage plant, H udson Coal Co., Jermyn, P a ... *813
— Correcting previous storage figures... 874
Coke and Coking — Byproduct and beehive o utp ut; Coal con sum ption ...2 0 , 122 — More Connellsville plants return to 1917 scalę ... .. 55
— Carnegie plant, Clairton, P a., biggest producer ... .. 56
— O utp ut coke, iron and Steel Iow in June ... 122
— Farrell plant closes as new Clairton ovens open ... 298
— Accident rate falls ... 322
— Mobile Cham . of Com. (A la.) protests coke rates ... 351
— British govt. w ill study coke, benzol and gas m fr ... 370
— Coking coals, vary in structural strength ... ... 406
— Salt damages walls of coke ovens... 430
— Coal and coke in house-heating p la n ts . . 434
— Byproduct coking, Book r e v ie w ... 450
— Coking by steam, (e) ... ■;... 461
— Coking strip-pit coal in 111... *485
— Screenings, Storage vs. coking, (e) .k. . 497
— A lab a m a coal-washing and cleanmg practice ... *501
— Great progress in A labam a : Semet-Solvay byproduct ovens. Birm ingham , A la. . . *506
— O utput. 1923, makes record ... 590
— Elec. ligh t plants contemplate gas. coke, etc business, 6 8 6 ; Semi-coke to supple- ment anthracite ... .... . . 687
— M aking coke from non-coking coals by froth flotation; Saar Valley coal. France ... 867
— Connellsville independents to fire 2,500 ovens ... ... 911
“Colliery Engineer,” The, (e) ... . . . . 354
Colorado — Victor-Amer. F ue l Co., shake-up of officials ... ... ... ,408
— Amer. Smeltg. & Ref. Co. lamp-rack. ' Bonearbo mine, *413; Rock-dusting m achinę ... ... *429
— O utp ut and value o f coal mines, 1923: table ... ; . 443
— Producers see good F a li prospects . . . . . . 444
— Mine feud referred to Gov. Sweet . . . . 519
— M offat tunnel through R o ckies...*52 0 — V-panel m ining progressing in s o u th .. *711
July-December, 1924 C O A L A G E 5
Page Colorado— Continued
— A guilar, Rock-dusting at Royal m in e ..* 7 5 6
— Y a m p a field may provide west w ith hard
coal ... 870
— Inspector w ant 8 mines made safer . . . . 877
— Hard on “hootch,” C. F. & I . prohibition policy ... 910
Commerce, see “Trade” Compensation Insurance — State insurance ten per ct. below comp’y rates i... 263
— Kentucky insurance comp’y fa ils to pay. . 265
— Seeks double compensation. two thum bs on one hand ... 838
— Saving by rock dusting ... 826
Compressed air, see “Eąuipm ent, A ir” Co ner e te — Eflec. drill to work in concrete ... *424
— Damp-proofing m ateriał for concrete sur- faces ...*424
Conscience, A case o f ...% . . . 406
Contracts Awarded — B itum inous coal lo r Navy yards and stations ... 19
Conveyors — Discharge end in 30-in seam.. longw all. . *72
— Glen Alden operates 3 longwall faces w ith conveyors ... *71
— Panel Bystem using conveyors ... *110
— Room-and-pillar system using conveyors, *111 — D raw ing pillars w ith conveyors ...*112
— Conveyor drive and control panel— Baker plant ... *117
— R ubber conveyor belt in stripping . . . . *143
— Oscillating face conveyors in B elgium . . 250
— Screw conveyors, Lykens, P a ...*255
— Belt-conveyor carrier pressed-steel s h e ll.. *351
— Dudley mine (Ky.) horizontal conveyor, *357 — Type th a t facilitates concentrated min- ing ...*541
— Belt conveyor used as slope hoist . . . . 577
— A utom atic brush sweeps dust from pan conveyor ... *594
— A utom atic lu bn cato r d e v is e d ...*842
— Four-mile belt system underground. *897; Tandem drive, *899; Belt linę, *902; Belt tests; table ... 904
Corbin C. & C. Co. install am algam plant, 124 Coronado coal case decision affirmed ... 93
Cost — Physicial differences affect production cost . . . . ... 15
— Knowing costs in m ining, (e) ... 35
— Large tonnage vs. Iow cost ... 38
— Rock dusting in In dianola (P a.) m ine. . 43
— Needless waste of power ... *47
— Coal vs. oil as f u e l ... 50
— Use o f fuel gas; tables ... 182
— Save power to reduce operating co sts.. *499
— Co-operative m arketing to cut coal cost. . 516
— Ky. chief electricians learn how to cut costs ... *545
— Trade associations to study uniform cost accounting ... 592
— Miners know how to cut mine costs. . . 621
^^Jost-accounting and tax commission named, N ational Coal Association. . . . 626
— Cost-saving in changing locomotiye wheels ...*664
— Systematic handling of motor parts reduces c o s t ...*664
— Rock dusting at Sunnyside, U tah ; table 873 Courts — M ajor (widów) sues miners’ union . . . . 17
— Joint-mine case, W . V a... 53
— Besson m ust pass exam ination, Court decides ... 92
— Coronado coal case, Decision affirmed. . 93
— Receiver appointed fo r Egyptian and O. K . Co.’s ... 94
— C ircuit Ct. at Springfield disallows rate cut in 111... 105
— Federal suit fo r demurrage, H am pton Roads ... 190
— Tenn. miners enjoined ... 482
— M aynard case postponed ... 554
— Coronado case up again ... 590
— Im p o rtan t cases reassigned ... 590
— Ju ry m ust conyict before contempt sentence ... 592
— U. S. Supreme Court dismisses appeal, Stickel vs. Big Laurel Coal Co... 626
— Supreme C ourt ru ling , priority orders upheld ... 763
— Hayes loses suit against V inton Collieries Co... 801
— Mine-guard system enjoined in W. Va. . . 803
— Judgm ent reversed, L . & N . R .R . vs. C. S. Nield ... 840
— Supreme Court upholds anthracite tax. . 840
— Supreme Court denies w rit to Penn. Mg. Co... 911
— Court allows jury tria l in labor disputes, 914 Crushers, See “ Rolls and Crushers” Dakota, N orth — No parley on lignite rates ... 67
Dakota, South — L ow rates on lignite ... 33
Darco, a boneblack, new product o f lignite 334 Dinosaur’s tracka in U tah coal ... 265
Dobbie portable incline in stripping ... *142
Drills and Drilling — Elec. drill to work in concrete or soft stone ...*424
— Drill press conveniences ...*555
— Drilling a hole by hand. *574; Elec. drill- ing ... *575
— D rilling a sheared face ...*607
— D riving casing and reaming borehole . . . *655
— Elec. drill m ounted on truck ... *748
Dust, See also “ Rock Dusting” — Ares and coal dust dangerous combina- tion ...*296
— Explosion gallery in In d ia ... 436
— Experiments m aking briąuets from waste dust ... 544
— Sprinkling systems in A labam a mines . . *580 — British experiment w ith “b itu lo id ” as dust layer. 615; Prevents coal-dust ignition ... 616
— Effect on health o f miners ... 758
— Coal dust non-hygroscopic, (e) ... 817
— Coal dust cured tuberculosis ... 821
— Dust collector lessens fire h a z a r d ... 835
— Housing to protect motor from dust . . . *843
— V acuum cleaner for sam pling coal dust, 864 E Earnings — P h ila. & Reading C. & I. Corp. 1923 report ... 18
— Burns Bros... 21
— W hat Illino is miners e a r n ... 874
Editorials — A-C locomotive haulage in mines m ust wait^ ... 710
— Acquaintance takes edge off disagree- ments ... 36
— As it is done abroad ... 36
— Algebra first ... 318
— A li ways are elear ... 675
— A Merry Christmas ... 891
— Another and a better world ... 140
— Another crime averted ... 107
— A phenomenon or an illusion ... 2
— A post-graduate course ... 743
— Are mines so u nhealthful? ... 743
— Are more miners needed? ... 108
— Arguments for unionism ... 2
— A superiority complex ... 140
— A union man says it at l a s t ... 570
— Be to our faults a little kind ... 353
— Better mines, the only hope ... 317
— Better than rock dust ... 744
— Breaking down bone coal ... 710
— Briąuetting incombustible ... 709
— Canadian competition ... 317
— Coal by pipę ... 245
— Coal claims credit ... 570
— Coking by steam ... 461
— Consumer obligation ... ... 175
— Domestic storage aids industrial ... 462
— Do you know or merely suppose? . . . . 70
— Economy in rockdusting ... 1
— Electricity as a simplifier ... 70
— E lim in atin g the janitor ... 675
— Everybody happy ...* .. 35
— Every m an has his own gas plant . . . . 35
— Every one’s job is easier than ours . . . 353
— Face the facts ... 606
— Facing the inevitable ... 818
— Fear and fa ta lity ... 782
— F ind a place for your slack ... 139
— F ourth annual model-mine number . . . . 69
— F um bling at the knot ... 855
— F unctioning badly ... 139
— Gas or coal? ... 175
— Get together electrically ... 781
— Give and take ... 245
— Glamor from the past ... 318
— Going after team w ork ... 640
— Going dry ... 245
— Grow ing power o f mine workers ... 892
— H a lf truths are misrepresentations . . . . 497
— H arrington and the flame safety lam p . . 605
— Have a heart ... 35
— H igh wages promote idleness ... 1
— His life for labor ... 606
— How about another club? ... 781
— How m any sub-bosses have you? ... 781
— Hygroscopic dusts ... 817
— Illin o is gets a loader scalę ... 107
— Indictm ents ... 462
— International courtesy ... 354
— “It can’t help i t ” ... 281
— Jo h n and W arren wrangle ... 389
— Keep cool w ith coal ... 426
— Keep Hoover’s men abroad ... 817
— Keep u p w ith progress ... 605
— Know ing versus guessing ... 35
— L aw and sentiment ... 282
— Let coal alone; th a t’s a l l ... 534
— Let politicians beware ... 246
— Let the foreman do it ... 817
— Line up w ith the best ... 856
— Long way to bottom of W orld’s coal bin ... 425
— M anufactured fuels filling need for smokeless coal ... 390
— M ining engineer architects ... 462
— More permanency; less m akeshift . . . . 569
— “M ud slinging” th a t’s worth-while . . . . 5Q9 — Near and fa r ... 675
— Need fo r cleaner coal ... 639
— New opportunities. new methods ... 891
— N ot being surę. be careful ... 317
— N o tim e to idle ... 245
— N ow it can be told ... 107
— N ow it can be told best ... 569
— O biit Coal Review ... 891
— One m eaning fo r every word ... 317
— One more laug h ... 569
— Others sufler too ... 533
Page Editorials— Continued — O ur British exemplars ... 210
— Our mine shops ... 354
— O ur modern proconsuls ... 353
— O ur ventilation notions ... 281
— Our wasteful railroads ... 709
— Outside the four walls ... 639
— Overloading locomotives ... 605
— Part of a larger program ... 354
— Paying fo r his keep ... 461
— Pooling brains and experience ... 855
— Possibilities o f stainless Steel ... 498
— Progress in safety ... 1
— P u t the price too h ig h ... 676
— Railroads m ight stimulate all-year-round buying ... 389
— Ready to your hand ... 781
— Right to be heard ... 782
— Rock dusting ... 209
— Rockefeller sheds no tears ... 2
— Screenings! Screeningsl ... 497
— Searching fo r the causes... 533
— Shifting f a n s ... 139
— Square company shooting ... 461
— “Standardization” means something now 534 — Summer coal ... 389
— T alking through the grround... 282
— The dollar m a r k ... 676
— The hum b u g harvest ... 498
— The intangible something ... 534
— The old, old ąuestion ... 533
— The private police nuisance ... 281
— The public generalizes ... 70
— The unsafety of safety la m p s ... 709
— The worst in d u s t r y ... 246
— Trip-gathering problems ... 176
— Troubles from new financing ... 245
— Twenty-five years w ith o ut a fa tality . . . . 743
— Union hostility to development... 640
— Union mines are safe... 426
— W anted: A leader ... 209
— W atching the paradę ... 108
— W atching our opportunities ... 855
— W ater as an aid to explosions... 176
— We could do th a t ourselves... 744
— We have skimmed the cream ... 281
— W hat foreign trade demands... 426
— W hat is safe? ... 817
— W h at makes for sta b ilizatio n ... 855
— W h at to do? W hat to d o ? ... 210
— White-House wages ... 818
— W ho are your favorites? ... 139
— W ho excuses him self is his own con- demner ... 676
— W ho is sinning n o w ? ... 175
— W hy all this ad o ? ... 710
— W hy foremen fa il ... 639
— W hy h u n t trouble? ... 426
— W ill gas m akin g at mines stabilize the industry? ... 1
— W orking in the dark ... 497
— Tes, it can be done, M r. L e w is... 533
— Yet there are compensations... 425
— Y o u ’d be surprised! ... 209
— Y o u r place in the coal ind ustry... 856
Education and Training — Educating the boys robs the m in e ... 113
— Electrical laboratory and classroom. . . . *268
— Standardization in m ining terms, (e) . . 317
— M athem atics vs. safety-first, ( e ) ... 318
— H ig h and Grade Schools, Hanna, W y o ..* 4 2 1 — Co-ordination reduces payroll loss...*572
— P ublic school, H iaw atha, U ta h ...*680
— Safety education planned in K y ... 730
— Post-graduate course, ( e ) ... 743
— Camegie Inst. to train graduates at mines ... 832
— Practical instructors in colleges, (e) . . . . 855
Eflaborate care fails to protect Gates m ine (P a.) ... *431
Electricity — Electricity as a simplifier, ( e ) ... 70
— W ill bear w atching in any coal m ine. . . .*2 2 3 — Bureau of mines testing gallery ... *223
— Electrification grows in So. Wales mines 229 — Instruction in electrical ap p ara tu s ... *268
— Elec. ares dangerous anywhere ... 289
— Ares and coal dust dangerous combina- tio n ... *296
— Static discharge from steam or air leaks, (e) ... 317
— Causes m any fires ... 434
— Principle of in s u la tio n ... 555
— Dangerous ground currents prevented; Testing to detect stray currents... *574
Electrical watchmen ... 717
Electric Installations — In su latio n tape. Color o f ... 10
— Steel transmission p ole... *34
— W iring diagrams complicated. ( e ) ... 35
— Abuse of elec. service co stly ... *47
— M etering corrects many abuses... *47
— Selecting righ t size wire for elec, circuit 58 — Area and capacity rubber covered wires; _ table ... 58
— Protecting d. c. feeders... *87
— High-voltage distribution, *83; Advan- tage of ... *95
— Three-phase system w itho ut neutral wire. *412; W ith neutral wire ... *413
Electric Lam ps — Opposed by u nio n in O k la h o m a ... 56
— Elec. lam ps now in use in O kla. mines 93 — Inspector Boyle knocks elec. la m p s . . . . 93
— Pracfice in K inloch slope. Parnassus, P a .*161 — Permissible elec. cap la m p ... *224
— Ares and coal dust dangerous combina- t . tio n . . . ... *296
— L igh ts fo r inside and .outside service.. . *412
— L am p rack that saves tim e ... *413
— H lum inated spectacles replace cap lam ps *45 9 — Air-driyen generator for elec. lam ps. . . . *531
Page
t C O A L A G E Vol. 26
Electric Lam ps— Continued
— Lock for elec.-light bulbs ... *603
— Lam ps b u m o ut under excess yoltage. . *731 — Introduced at R u m Crk. Colly, Dehue. W . V a ... 870
Elec.-light plants contemplate g as, coke, etc. business ... 686
Electric Plants and Stations — L ehigh Valley Coal Co. booster stations..*153
— A uto m atic panels, underground station. . *184 — Safe substation ...*225
— Fireproof substation underground ... *292
— H am pton p um p in g station, Scranton, Pa. *340 “E q u al opportunity fo r all in business.” Hoover ... 878
E qnipm ent, A ir — Pneum atic grinder w ith b a li bearings. . .*10 5 — *Gasoline-driven air compressor ... *173
— Sprayer for plastic m ateriał ...*243
— Mine hoist w ith electro-pneumatic control 244 — Pneumatic-elec. ham m er d rill ...*424
— Air-driven generator for elec. la m p ... *531
— Straight-line, 2-stage air compressor. . . *603
— Well-balanced air compressor m ounted on m ine car ... *674
— Air-motor hoists fo r m any jo b s ... *741
— Air-lift removes flood water economically *868 — Multi-stage. centrifugal compressor w ith im proved type of governors ... *926
E quipm ent, Electrical. See also “ Transformers” — Trolley motors in mines, W alsh opposes 17 — Elec. heaters dry out motors and conduits 24 — Three-phase voltmeter circuit; Diagram . *24 — T otalizing polyphase wattm eter ... *34
— D.-C. watt-hour meter ... *48
— A.-C. watt-hour meter ... *49
— Static condenser u n it to im prove power factor ... *67
— Cable connector w ith enclosed fu se ... *68
— To prevent burning of brushes, Lubrica- tion ... *96
— Rock dusting m achinę treats roof and ribs ...*127
— Storage-battery elevating truck to trans port load ... *138
— Elec. screw driver revolves when pressure is applied ... 1*138 — A utom atic circuit breakers, L . V. C. Co... *152, *184 — Storage batteries pum p and ventilate idle mine ... 163
— Grinding o utfit for heavy w o rk ... *173
— F ittin g latest switchboard appliances to generators, etc...*184
— Switchboard diagram ...*186
— Therm al overload relay. etc... *187
— Gasoline engine runs generator in emer- gency ... *189
— H andling armatures, Box on castors for *194 — L ig h t elec. hoist p ulls cars, etc...*208
— Should positive conductor of generator be grounded? (In q .) ... *233
— Mine hoist w ith electro-pneumatic con trol ... ? ... 244
— Machine-tool controllers fo r d.c...*244
— Sprinkler car operated by 3-hp. m otor ..*267
— Testing laboratory, Penn. C. & C. Co.. Cresson, P a ...*268
— P um pin g u n it elec. driye fo r draining sump ... *269
— Portable power plant for gassy m in e s .. *279
— M otor starter for high-torque d u t y . . . . * 2 8 0 — Motor-generator set in Mine No. 1, U. P. Coal C o ... *292
— C utting out an interpole on series motor *304 — P u llin g cables into m anholes...*304
— Rotary converter breaks down for lack of foundation ' ... 305
— H olding feeder wire from mine hanger . *305 — Watt-hour meter. Smali and lig h t... *316
— Copper-to-steel bond, how made and tested ... *330
— Submerged motors dried in 5 days... *340
— Elec. forge saves tim e ... *341
— Elec. repair shop ... 341
— Series and paraJlel controller. *368; Storage-battery controller, *369; Over- load relay; Electro-pneumatic con- tactor ... *370
— Barrel on trolley track to fili battery cells ...*378
— Im proved pole-top switch ... *386
— Resistance for testing and charging. . . . *413
— Bell w ith no contacts...*423
— Starting compensator. time-temp. r e la y .. *423
— D rill to work in concrete or soft-stone *424 — Approved equipment, vs. open type... 434
— Elec. heating oven to keep equipment dry ...*448
— Removes arcing brushes and runs w ithout t h e m ... 448
— Elec. hoist can set on tim ber flloor or colum n ...*460
— Care in choice and keep of fuses and switches may avoid a c c id e n ts ...*468
— Safe motor-starting switch ... *495
— Power drive fo r die stocks... *495
— Starter for hig h yoltage induction motors *496 — Double-unit drive. a.-c. m o t o r ... *521
— Sim ple test board for s h o p ... *522
— W elding generator ... *531
— Investigations by Bureau of Mines, (e) . . 533
— In su latin g rubber cable ends to reduce leakage ...*555
— Oli circuit breaker for h ig h d u ty ...*568
— D rillin g shot hole electrically... *575
— Bond testers that w ill tell t r u t h ... *593
— High-speed m otor operates grinding wheel ... *604
— Safety in improved equipment, ( e ) ... 605
— C u tting down old brushes true m otor economy ...*627
Pa ge Equipm ent, Electrical— Continued — Use of trolley wire as meter s h u n t. . . . *627
— Ju d g ing quality o f adhesive tape . . . . 628
— Starter hopeless and no spare available *628 — A utom atic resistance starter has push- b u tto n control ... *637
— Synchronous motors successful, *644; H igh power factor type ...*645
— A utom atic reclosing breaker operated m anually ... *673
— Semi-automatic resistance starter ... *674
— Am erican vs. European m ines...*684
— Waste of money to install wires in under ground conduits ... *697
— Coil springs as belts in graphic watt- meters ... 697
— Meters easily demaged by wrong connec- tions ... ... *698
— Sm ali elec. hoist for Iow headroom ... *708
— Controls that sim ulate h um an direction *717 — Ward-Leonard control reduces rheostat loss ... 719
— Watt-hour meter w ith power-factor curve ... *742
— D rill mounted on tr u c k ... *748
— Two-motor hoist. Orient No. 2 mine, 111... *755
— Electric program, H. C. F rick Coke Co... 765
— Switch w ith each part on separate base..*779
— Across-the-line starter ... *780
— G iant electrical stripping m ac h in ę...*789
— Meters all loads at common point, cuts bills ... *793
— Disconnecting switch well insulated. . . . 816
— Synchronous motor, rope drive, *829; Better yoltage conditions ...*830
— Ten notable points of electrical progress 831 — Storage-battery electrification safer in gaseous mines ... 836
— M otor screened from dust ... *843
— Ampere-hour meter takes bumps and jolts ... *889
— Inductive time-limit motor starter... *890
— Lampless voltage tester ...*890
— Double-reduction gear box and motor set. *903 — Typical inside switchboard and starting panel ... *905
— Rotary conyerter vs. motor-generator set 907 — Storage batteries have m any uses... 908
— High-voltage tester and transformer. safe and portable ... *915
— Lubricating motor-generator set ... *916
— Insulation resistance depends on design of coil slots ... 916
— Elec. pyrometers record elear indications.*925 — Compact ribbon resistor ...*926
Equipm ent Steam. See also “Boilers and Furnaces — Steam-engine crankpin, Repair o f ...*126
— Sprayer for plastic m ate riał... *243
— Simple device removes water from steam line ... ' ...*378
— Steam trap designed for extreme pres- sures ... *637
— Two-cycle Diesel-engine has Iow operat- ing cost ... *638
— Steam for em ergencies... 831
Everybody’s colored valet, “M r. Nobody” ; Cartoon ... *716
Explosions, Mine — Loomis Coll’y, Glen Alden Coal Co.. Report on ... 17
— *Gates mine (P a .), Second gas explosion, 156; Due to accidental ignition of ex- plosives ... 264
— W ater as aid to explosions, ( e ) . . . . 1 7 5 , 198 — Dust explosion, Appearance at mine m o u t h ..., ... *226
— W hat happens when a coal m ine “goes „ UP.” ...*296
— Castlegate, Recovery work, Lessons taught 323 — Gates mine explosion. Pa., *431; Deto- nators the cause... 432
— Kemmerer Coal Co., Sublet, W y o ... 442
— Carbon Fuel Co., Rains mine, Castlegate, U tah ... 442
— Hart Coal Corp.’s mine. Madisonyille, Kv. 626 — Prevention and fighting mine explosions..*689
— Reversing air current in m in e ... 689
— Explosions occurring when unwatering mines ... 723
— Rock dusting a cure; Cost negligibie, *825; W atering method costly, 826; W atering working faces... 827
— Nine miners die in Welsh m ine. . 841
— Explosives. See also “ Blasting” — B]ack powder. U. P. Coal Co. eliminates. 7; Exploded by electricity, 1 1 ; Per- centage consumed in coal m ining; Pro- duction; Distribution in states. . . . 10
— Permissibles vs. high explosives, Con- sum ption ... — Few superintendents know risks. . 161
— m aPsport exPl°sives in insulated boxeś 225 — Tests of detonation w ith dust between cartridges ... £67
— ®^ec- detonators cause explosion... .. 43 2 Grt. B ritain to study American explosives. 480 § °y s build fire w ith stolen dynam ite. . . 592
— ■£°7 deT of coal produeed; table. 609 — O utput. 1923, exceeds that of 1 9 2 1 . . . . 727
Check book to end powder disputes. . . . *815
Page Fans and Blowers — Typical fa n drives, Glen Alden mines *84 ? C?inomy i n 8hlftlng mine fans, ( e ) . . * — Bell sounds when fan stops. — Man-cooling shop fan ... * ... , Pro,tected against ekpiósióń’ ‘ — £ ! ° ^ ers in rock dusting . . n w ° h} owe/ delivers air to boH erś!! * * — Two-motor fan drive ... ... , *86139 162243 306 428460 521 Page Fans and Blowers— Continued — Fan-engine regulator autom atic speed control ... *568
— A ux iliary drive for m ine f a n ... *578
— Factors th a t control choice of fans, *644; Operating curves o f fa n drives, *645; A utom atic operation ... 646
— Duplicate fans and steam lines, *689; Duplicate drive ... *764
— F an installations at 111. mine, *690; at •Glen Alden mine, Scranton, P a ... *691
— Dust-blower machines ...*786
— Protecting fa n against explosion... *805
— F an exhaust supplies heat for wash water ...*880
— Inexpensive mine f a n ... *890
— Mine fan house at Mexican m in e ...*895
Fatalities. See also “ Accidents" — Rate, per man, per ton, sure to de- crease; table ... *12
— June, 1924, causes and states; t a b l e . . . 192
— Coke ovens, Accident rate fa lls. ... 322
— Castlegate explosion, 171 m en killed. . . . 323
— J u ly accident rate U. S.; ta b le ... 336
— Explosion in Kemmerer Coal Co.\s mine kills 39 men ... 442
— Explosion in U tah mine entombs 5 m en. 442 — Lives lost in U. S. mines; ta b le ... 519
— Three miners killed by blast in West Ky.. 626
— Lives lost in U. S. mines in September; Table ... 659
— Coal-mine fatalities, 1920-22, by coun- tries; table ... 694
— Gay C. & C. Co., Logan, W. Va., No fatalities in 25 yr., ( e ) ... 743
— Data on actual conditions suppressed. . . 759
— Mine accidents in October; ta b le ... 838
— Nine miners die in W elsh m ine explosion 841 Fires, Mine — Fire protection in U tah m in e ...*292
— Crossed wires cause fire in Lincoln mine, Ohio ... 300
— P łu g and hose always ready... *449
— Two anthracite m ine fires... 554
— V entilation and stowage reduce fire hazard ... 654
— Preparations against fire and how to fight fire ... *689
— Fire may reverse air current... 691
F irst Aid. See also “ Rescue W o rk” — Should no t treat eye tro u b le ... 46
— Cum berland team proves best in Wyom- ing ... *264
— Training in first-aid work ... *573
— Mabscott team, New R iver Co.’s contest. Hope. W . V a ... *601
F loodlighting the mine y a rd ...<*269 Ford, Henry — Leases Superior dock, 91; Buys dock. . 121
— Ford’s road pays 12 per ce n t... 190
— W ill enter retail coal business... 264
— F ord agencies retailing c o a l... 375
— Scheme puzzles dock m e n ... 727
— Moves coal records by wagon train . . . . 804
France — Coal o utput gains ... 122
— A ttitu d e toward Germany and reconstruc- tion ... *439
— Lens, Business section and garden yillage views ...*440
— Chemists test gasoline sub s titu te ... 554
— Saar Valley coal makes coke... 867
Friendly receiver fo r St. L ouis C. & I. Co. 375 Fuels — Comparative cost in use of three fuels; table ... 183
— Powdered coal conveyed by pipes, (e) . . 245
— Peat changed to C o a l... 266
— Pulverized anthracite burned at Lykens, P a ... *253
— Brown coals useful as fu e l... 329
— Discuss fuels at Cornell Univ., Chemists to ... 337
— W ill m anufacture fuel by Trent process 372 — M anufactured fuels filling need for smokeless coal, ( e ) ... 390
— Pulverized fuel ... 414
— Devices for saving fuel, ( e ) ... 498
— Experiments m ak in g briquets from coal dust waste ... 544
— Gas and coke vs. Petroleum p ro d u e ts.. 68 6 — F uel consum ption and power o u tp u t u p 693 — F uel oil vs. gasoline ... 694
— Briquetting incom bustible, (e) 709; Trent process m ak in g briquets, *715; Trent Superfuel Co., reorganized ... 730
— H eating yalues of coal, oil and gas, Per- centage; table ... 767
— U tility coal consum ption u p; power peak 841 — Central-heating economies ... 875
Furnace stoking, etc. See “ Boilers and Furnaces” G Galvanizing wire fencing, New Process. . 138
Gas and Gases — M aking gas at the mines. (e) 1 , (e) . . 107
— Oxygen filters into hemoglobin ... 45
— Carbon m onoxide absorbed in bl o o d . . . . 46
— Hydrogen solidified ... 90
— Gas vs. coal in power production, (e) . . 175
— £ as rarely replaces coal for house heating 182 — Gas by the carload... 288
— Ig n itio n by static discharge in steam or air leaks, ( e ) ... 317
— L iq u id oxygen as explosive...326
B ritish govemment to study coke, benzol and gas m an ufacture ... .. . 370
