682 THE COLLIERY GUARDIAN. September 25 1914. No. 41. TH E COLLI ERY GUARDIAN MONTHLY LIST OF RECENT COAL LITERATURE I.—General. Applications to Avoid or Suspend Patents. “ Colliery Guard.,” September 18, p. 629. (The Baum patents.) Mineral Industry of Austria-Hungary in 1913. “ Col- liery Guard.,” September 4, p. 518. . '' The Belgian Coal Mining Industry. “ Colliery Guard.,” September 4, p. 514; 4 fig. Mine Signboards. E. Higgins and E. Steidle. “ Col- liery Guard.,” August 28, p. 465; 2 fig. (From “ Technical Paper 67,” U.S. Bur. Mines.) The Future of Mining in China. K. Nishiza^a. “ Journ. Roy. Soc. Arts,” September 18, p. 897. The Powell-Duffryn Steam Coal Company Limited, 1864-1914. Cardiff, 1914. The Black Diamond’s Year Book. Chicago, 1914. Some Aspects of Industrial Chemistry. L. H. Baeke- land. “ Science,” August 7, p. ,179. (Address at Columbia Univ.) The Specific Heat of Solids and the Principle of Simi- litude. R. C. Tolman. “ Physical Rev*,’’ vol. 4, 2, p. 145. Germany’s Markets. I. : Sulphate of Ammonia and By-Products of Coal. “ Colliery Guard.,” August 21, • p. 418. II. : Coal, August 28, p. 477; September 4, p. 530; September 11, p. 577. Ill,: Electrical Appliances and Apparatus, September 18, p. 617. Annual Report of the Under-Secretary for Mines, Queensland, 1913. Brisbane, 1914. III.—Geology. Folded and Faulted Zones in the Crowsnest Pass Dis- trict and their Operative Effect Upon Economic Mining. R. R. AVilson, “ Bull. Canad. Min. Inst.,” August, p. 27; 4 fig. Rock Temperatures. E. J. Moynihan. “ Colliery Guard.,” September 4, p. 534. (From “ Journ. Chem. Metall. Min. Soc. S. Africa.”) Directions for the Collection of Geological Specimens. J. W. Evans. : “ Colliery Guard.,” September 4, p. 517. (From an official publication.) Unknown Clays in Coal Alines. J. W. Mellor. “ Col- liery Guard.,” September 11, p. 567. (Paper read before Inst. Alin. Engin.) Weathering of the Pittsburg Coal Bed at the Experi- mental Aline, near Bruceton, Pa. H. C. Porter and A. C. Fieldner. “ Colliery Guard.,” August 28, p. 463; 8 fig. (From “ Technical Paper 35,” U.S. Bur. Alines.) A Review of Igneous Rock Classification. G. AV. Tyrrell. “ Science Progress,” July, p. 60. Nodules with Fishes from the Coal Aleasures of Kansas. W. H. Twenhofel and L. 0. Dunbar. “ Am. Journ. Sei.,” August, p. 157. A Chemical Examination of the Organic Alatter in Oil Shales. J. B. Robertson. “ Proc. Roy. Soc. Edin.,” vol. 34, 2, p. 190. (The carbon-hydrogen ratio varies from 6 to 8 and over. The lower this ratio the larger the amount of oil produced from a definite percentage of organic matter. The ratio is lower than that of bituminous coals. There is little resinous substance, the main bulk of the organic material being insoluble in organic solvents. The organic substance is a decomposition product of vegetable matter similar to that found in peat and cannel coal, and produced by a definite combination of external conditions.) Coal Resources of Queensland. B. Dunstan. “ Queens- land Geol. Surv.,” No. 239. Brisbane, 1913. Clay and Shale Deposits of New Brunswick. J. Keele. “ Canada Geol. Surv.,” Alem. 44. Ottawa, 1914. Report on the Results of the Alineral Survey of Southern Nigeria, 1913. AV. R. Dunstan. London, 1914, Id. [Cd. 7567.] IV.—Mine Surveying. Levelling Practice in Connection with Alining. IL P. Roberts. “ Alin. Eng.,” July, p. 123; September, p. 170; 4 fig. The New K. and E. Stadia Circle. “ Coal Age,” August 15, p. 268: 1 fig. V.—Mining Technology. Theory of the Stresses in a Curved Bar as Applied to Hook Design. AV. L. Cathcart. “ Alachinery,” * September, p. 29; 2 fig. Practical Coal Alining. T. A. Alather. “ Coll. Engin.,” September, p. 61. Bending Stresses in Hooks-and Other Curved Pieies. A. Alorley. “ Engineering,” September 11, p. 321: 8 fig. The Lack of Efficiency Engineering in Alining Opera- tions. L. Balliet. “ Alin. Eng. Wld.,” August 22, p. 327. VI.—Working of Minerals. The Working of Under-sea Coal. J. Alorrison. “ Iron Coal Tr. Rev.,” September 18, p. 367. (Paper read before Nat. Assoc. Coll. Alan.) Coal Alining Practice in Jackson County, Illinois. S. C. Andros. ” Black Diamond,” September 5, p. 182; 6 fig. Methods of AVorking a Thin Coal Seam at Joggins, Nova Scotia. C. H. AlcL. Burns. “ Canad. Alin. Journ.,” August 15, p. 537; 4 fig. Practical Notes on A'lachine Alining. L. C. Stevens. ” Bull. Canad. Alin. Inst.,” August, p. 33; 10 fig. Double-Entry System in Arkansas. “ Coal Age,” September 5, p. 372; 1 fig. AVorking Steep Seams at the Alontrambert Colliery. F. Arguillere. “ Colliery Guard.,” September 11, p. 563; September 18, p. 616; 13 fig. (Trans, from “ Bull. Soc. Ind. Min.”) VII.—Boring, Shaft Sinking, and Tunnelling. Rock Drill Repair Costs. C. K. Hitchcock, junr. “ Sch. Alines Qrtly.,” vol. 35, 2, p. 117; 2 fig. Specifications Relating to Compressed Air in Tunnel Work. F. C. Noble. “ Canad. Engin.,” August 6, p. 269. An Improved Tunnelling Alachine. “ Canad. Engin.,” August 13, p. 303; 3 fig. (Alachine invented by O. O. App, and made by the Terry, Tench, and Proctor Tunnelling Machine Company, of New York.) VIII.—Explosives, Blasting. The Exudation of Nitro-Glycerine. AA7. Cullen. “ Sth. African Alin. Journ.,” August 15, p. 621. Missfires in Sinking Shafts. K. Jentsch. “ Colliery .Guard.,” August 28, p. 466; 6 fig. Explosives in Coal Alines. “ Colliery Guard.,” Sept. 18, p. 632. (Order of August 29.) IX.—Timbering, Packing, etc. Preservative Treatment of Timber for Estate Purposes. J. F. Annand, M.Sc. “ Quart. Journ. Forestry,” July, p. 169. (Results of experiments with saponified creosote and naphthalene by the open tank (soaking) method.) British Grown Timber. “ Colliery Guard.,” August 28, p. 468. X.—Surface Arrangements. Developments at Alain Colliery, Neath. “ Iron Coal Tr. Rev.,” Sept. 18, p. 359; 4 fig. . The Superior Coal Company. AV. Z. Price. “ Coll. Engin.,” September, p. 89; 5 fig. The High Shaft Aline. AV. G. Burroughs. “ Coll. Engin.,” September, p. 69; 1 fig. (An Ohio mine.) The J. K. Dering Coal Company. W. Z. Price. “ Coll. Engin.,” September, p. 65; 10 fig. The Truesdale Colliery. P. H. Devers. “ Coh. Engin.,” September, p. 57; 7 fig. The Dominion Coal Company Limited. “ Canad. Min. Journ.,” September 1, p. 579; 11 fig. A Visit to Altofts Colliery. S. Dean. “ Coal Age,” August 29, p. 332; 13 fig. XI.—Winding and Haulage. Electric Haulage on the Iron Ridges. E. C. de AVolfe. “ Alin. Eng. AVld.,” September 5, p. 425: 23 fig. Steel Aline Ties of the New Slick Type. S. R. Stone. “ Alin. Eng. AVld.,” August 15, p. 296: 2 fig. The Requirements for Economical AVinding. J. A. Turnbull. ” S. African Engin.,” August, p. 29; 7 fig. XII. —Signalling. Visual and Aural Indicator at Dee}) Navigation Col- lieries. “ Iron Coal Tr. Rev.," September 4, p. 315: 3 fig. XIII. —Lighting. The Physiological Characteristics of Acetylene with Respect to its Use in Alining. E. E. Smith. “ Sch. Alines Qrtly.,” vol. 35, 2, p. 143. (Paper read at meeting of the International Acetylene Association.) The Nomenclature and Definition of Photometric Alag- nitudes and Units. A. P. Trotter. “ Ilium. Engin.,” July, p. 339. (Paper read before Ilium. Engin. Soc.) XIV.—Ventilation. Pure Air for Underground Alines. E. Higgins. “ Iron Tr. Rev.,” September 3, p. 429. (Paper read before Lake Superior Alin. Inst.) Economy of Varying the Speed of Aline Ventilating Fans. “ Coal Age,” September 5, p. 387. The Ramsay Aline Door Closer. “ Coal Age,” September 5, p. 375: 1 fig. A Two-Speed Alternating Current Alotor for Aline A7en- tilation. AV. H. Easton. “ Coal Age,” September 5, p. 374; 2 fig. Common Sense and Economy in Fan Ventilation. J. C. Gaskill. ' “ Coal Age,” September 5, p. 377. (Arguments against excessive amount of air and high water gauge.) Shaft Ventilation at Butler Colliery. “ Coal Age,” September 5, p. 371; 3 fig. (A 6 ft. by 14 ft. fan direct connected to a steam engine, operating at 130 r.p.m., delivers 215,000 c. ft. against a 2-8 in. water gauge.) On Some Sources of Disturbance of the Normal Atmo- spheric Potential Gradient. AV. A. D. Rudge. “ Proc. Roy. Soc.,” series A, vol. 90, No. A 622, p. 571; 5 fig. Some Notes on the Aleasurement of Air Velocities, Pressures, and Volumes. AA7. Cramp. “ Proc. Man- chester Lit. and Phil. Soc.,” 5 fig. XV.—Mine Gases, Testing. The Estimation of Carbon Monoxide. J. I. Graham and T. F. AVinmill. “ Journ. Chem. Soc.,” August, p. 19961 fig. The Dilution Limits of Inflammability of Gaseous Afix- tures. I. : The Determination of Dilution Limits. II. : The Lower Limits of Hydrogen, Methane, and Carbon Alonoxide in Air. H. F. Coward and F. Brinsley. ” Journ. Chem. Soc.,” p. 1859; 18 fig. (The lower limits of inflammability of three gases in air, the mixture being saturated with water vapour at 17 degs. to 18degs., and the total pressure atmo- spheric, were found to be : Hydrogen, 4-1 per cent.; methane, 5-3 per cent.; CO, 12-5 per cent.) Improved Apparatus for the Analysis of Alixed Gases. A. C. AVilson. “ Analyst,” September, p. 391; 1 fig. (Newr apparatus suggested by Dr. Stead.) Some Remarks on Gas in Coal. G. A. Lavoie. “ Bull. Canad. Alin. Inst.,” August, p. 53. The Absorption of Oxygen by Coal. T. F. AVinmill and J. I. Graham. “ Colliery Guard.,” September 11, p. 564; September 18, p. 1313; 6 fig. (Paper read before Inst. Min. Engin.) Instruments for Testing Gas. “ Engineering,” Sept. 18, p. 362: 4 fig. (Instruments made by A. Wright and Company.) XVII.—E xplosions. A Visit to the British Experimental Station at Esk- meals. S. Dean. “ Coal Age,” August 22, p. 294; 5 fig. XX.—Drainage, Pumping, etc. A Large Steam Pump Installation. “ Coal Age,” August 22, p. 302; 3 fig. XXI.—Preparation. AVashing AVestern Kentucky Coal. N. G. Alford. “Coll. Engin.,” September, p. 77: 8 fig. (Results obtained by the use of bumping tables.) Sizing of Coal for Locomotive Vse. A. G. Kenyon. “ Coal Tr. Bull.,” August 15, p. 51. (Paper read Int. Rly. Fuel Assoc.) Alodern Preparation of Bituminous Coal at the Aline. R. G. Read. “ Coal Age,” August 15, p. 255: 16 fig. XXIII.—Coke Ovens. Charging and Discharging Alachinery. J. L. Eigenbret. “ Gas Age,” August 15, p. 163; 5 fig. (Plant at St. Louis, erected by Bartlett Hayward Company, of Baltimore.) Determination of Ammonia in Gas. J. D. Edwards. “ Gas Age,” August 15, p. 176: 6 fig. (From “ Circ. 34,” U.S. Bureau of Standards.) The Alanufacture of Nitric Acid and Ammonium Nitrate from Ammonia. Prof. Dieffenbach. “Chem. Eng.,” August, p. 227. Coking Processes for AVestern Canada. T. B. AVilliams. “ Bull. Canad. Alin. Inst.,” August, p. 59: 15 fig. Adaptability of AVest Virginia Coals to By-Product Coking. E. B. AVilson. (Paper read before AV. Va. Coal Alin. Inst.) XXIV.—Fuels, Testing, etc. Peat in Iron Ore Industry. P. Christianson. “ Iron Age,” August 27, p. 490: “Iron Tr. Rev.,” August 27, p. 383. (From paper read before Am. Peat Soc.) The Calculation of Constants for the Heats of Combus- tion of Hydrocarbons. H. Stanley Redgrave. “Chem. News,” Aug. 14, p. 73. A Regularity Between the Alolecular Heat of Combus- tion and its Bearing on the Constitution of the Hydrocarbons. G. Le Bas. “Chem. News,” July 17, p. 26: July 24, p. 37. Catalysis in the Gas Industry. “ Gas AVld.,” September 12, p. 265; “ Journ. Gas. Lightg.,” September 8, p. 570. (Paper read before N. British Assoc. Gas Algrs.)