2 Abrasive materials in 1931; by Paul Hatmaker and A. E. Davis. 20 p. 54. Cobalt, molybdenum, tantalum, and titanium in 1931; by P. M. Tyler and A. V. Feldspar in 1931; by H. H. Hughes and Jefferson Middleton. 12 p. 54. Platinum and allied metals in 1931; by H. W. Davis. 13 p. 5¢. Silica in 1931; by E. R. Phillips. 6 p. 54. Slate in 1931: by Oliver Bowles and A. T. Coons. 13 p. 54. II. PERIODICAL SERVICE REPORTS As required by the economy law enacted by the last Congress, the following periodical service reports have been placed upon a subscription basis. The subscription rate for each of these reports has been fixed by the Secretary of Commerce at $1 per year. Single copies may be purchased at the following prices: Weekly reports, 54; monthly reports, 10¢. Checks or money orders in payment for these periodical reports should be made payable to the Treasurer of the United States; postage stamps are not acceptable in payment. Orders and remittances should be sent directly to the Information Division, WEEKLY WCR 799. Weekly coal report for the week ended October 29, 1932. 2 p. 1 illus. 5¢ each; $1 per year. WCR 800. Weekly coal report for the week ended November 5, 1932. Stock supplement. 3 p. 1 illus. 5¢ each; $1 per year. WCR 801. Weekly coal report for the week ended November 12, 1932. 2 p. 1 illus. 5 each; $1 per year. WCR 802. Weekly coal report for the week ended November 19, 1932. 2 p. 1 illus. 5¢ each: $1 per year. (These reports give latest available data for period indicated on production of anthracite, bituminous coal, and beehive coke, and on tidewater and lake shipments. Supplements are included showing monthly consumption of coal by railroads, electrical utilities, by-product coke plants, general industrial plants, retail coal dealers, and steel and gas works.) MONTHLY CB 137. Monthly cement statement for October, 1932. 4 p. 1 illus. 10¢ each; $1 per year. (Presents current statistics on output and proportion of capacity utilized; includes comprehensive current figures on distribution of cement, by States, and latest available data on imports and exports.) E 15. Consumption of explosives in September, 1932. 6 p. 10¢ each; $1 per year. E 16. Consumption of explosives in October, 1932. 6 p. 104 each; $1 per year. 23 p. 10 each; $1 GA 43. Geophysical abstracts No. 43; by F. W. Lee. 23 p. per year. (Reviews recent articles, books, and patents concerned with geophysical methods of prospecting.) MCD 15. Monthly coal-distribution report for October, 1932. 4 p. 1 illus. 10¢ each; $1 per year. (Summarizes distribution of bituminous coal and anthracite shipments by water and rail.) MCR 56. Monthly coke report for October, 1932. 2 p. 1 illus. 10¢ each; $1 per year. (Shows production of beehive and by-product coke, by States, and consumption of coal in manufacture of coke.) P 99. Monthly petroleum statement for September, 1932. 12 p. 10¢ each; $1 per year. (Presents data on production, imports, exports, stocks, and demand for crude petroleum, refined petroleum products, and natural gasoline.) 3 PCC. Preliminary estimates of production of coal and beehive coke for the month of October, 1932. 1 p. 10¢ each; $1 per year. (Recompilation of weekly statistics published in Weekly Coal Report of the Bureau of Mines. Intended for use of business statisticians, editors, and others who desire monthly data. Monthly figures are issued on the 5th of the month.) III. FREE PUBLICATIONS Limited editions of the following publications are available for free distribution by the Section of Publications, Only one copy of any publication can be sent to the person applying, because of the limited editions. Applicants will confer a favor by requesting only those publications actually needed. REPORTS OF INVESTIGATIONS 3189. Falls of roof and coal in the Book Cliffs and Wasatch Plateau coal fields of Utah; by Herbert Tomlinson. 24 p. 16 illus. (Summarizes data obtained at 12 mines, representative of the various physical characteristics of principal coal beds. Notes physical and operative features influencing falls.) 3190. Economics of potash recovery from wyomingite and alunite; by J. R. Thoenen. 78 p. 8 illus. (Contains data from a field survey of deposits as to accessibility for exploitation, probable location of treatment plants, source and cost of raw materials, and probable markets for products. Gives information obtained from study of patents concerning operating costs and processes having attractive financial possibilities.) 3191. The effect of the crimped paper ends on cartridges of permissible explosives in propagating detonation; by D. B. Gawthrop. 7 p. 1 illus. (Describes the halved-cartridge gap test by which is determined the sensitivity of explosives to detonation over an air gap. Gives results of tests of seven samples of similar components but varying physical character.) 3193. Character of drainage from mines in the Thick Freeport coal bed, Pennsylvania; by R. D. Leitch, W. P. Yant, and R. R. Sayers. 29 p. 1 illus. (Gives character of samples of outflow and inside mine waters, with general information available.) 3197. Composition of the fractions of primary and high-temperature tar; by E. B. Kester and W. D. Pohle. 11 p. 3 illus. (Reports results of pyrolysis of primary products of coal decomposition in high-temperature coking practice, both as to total quantities of chemically similar constituents and as to their distribution throughout boiling range.) INFORMATION CIRCULARS 6653. Mining statutes of the State of Pennsylvania; by J. A. Huff and V. V. Baker. 106 p. (Summarizes laws concerning the operation of anthracite and bituminous coal mines and of oil and gas wells.) 6654. Mining laws of Norway; by E. P. Youngman. 16 p. (Outlines phases of law relating to rights of American citizens to carry on mining activities in Norway.) 6659. Methods and costs of dredging auriferous gravels at Lancha Plana, Amador County, Calif.; by C. G. Patmon. 16 p. 3 illus. (Gives brief history of operation and describes deposit, dredge, and gold-saving equipment.. Summarizes costs.) 6660. Description of the property and operations at the Lewiston dredge, Lewiston, Calif.; by L. K. Requa. 14 p. 5 illus. (Touches upon history and character of dredging area. Gives methods of prospecting and sampling, dredge construction, gold-saving equipment and operation, and general operating details. |