274 references: economic geology 



The rate of burning of fuse as influenced by temperature and pressure. W. O. Snell- 

 ing and W. C. Cope. Technical Paper 6, pp. 28. 1912. The results of a 

 careful investigation of the influence of pressure, temperature, moisture and 

 mechanical injury on the rate of burning of ordinary blasting fuse, w'th atten- 

 tion to the bearing of the results on the use of explosives in mines. 



Investigations of fuse and miners' squibs. Clarence Hall and S. P. Howell. 

 Technical Paper 7, pp. 19. 1912. Among the subjects investigated were the 

 characteristics of different brands of miners' fuse, the quantity of powder used 

 per foot in miners' fuse, the size of the powder grains, the gases produced by 

 combustion, and the relative safety and efficiency of fuse for use in mines. 



Methods of analyzing coal and coke. F. M. Stanton and A. C. Fieldner. Techni- 

 cal Paper 8, pp. 21. 1912. Gives in detail the analytical methods used in the 

 Pittsburgh laboratory of the Bureau of Mines for analyzing samples of coal 

 and coke and determining their heating value. The methods are essentially 

 those recommended by the American Chemical Society, with modifications 

 that have been found desirable. 



Liquefied products from natural gas, their properties and uses. I. C. Allen and G. 

 A. Burrell. Technical Paper 10, pp. 23. 1912. Briefly discusses early at- 

 tempts at liquefying natural gas; describes experiments made by the authors; 

 gives analyses of those types of natural gas yielding the largest proportion of 

 liquefied products; and discusses the properties and industrial uses of these 

 products. 



ECONOMIC GEOLOGY. — Contributions to economic geology (short papers and 

 preliminary reports) 1909: Part 11, Mineral Fuels. Marius R. Campbell. 

 Bulletin U. S. Geological Survey No. 431. Pp. 254, maps and sections. 1911. 

 This volume comprises the following articles: Natural gas in North Dakota, 

 A. G. Leonard; The San Juan oil field, San Juan, Utah, H. E. Gregory; Gas 

 and oil prospects near Vale, Oreg., and Payette, Idaho, C. W. Washburne: Gas 

 prospects in Harney Valley, Oreg., C. W. Washburne; Preliminary report on 

 the geology and the oil prospects of the Cantua-Panoche region, California, 

 Robert Anderson;. The southern part of the Cahaba coal field, Alabama, 

 Charles Butts; The Powell Mountain coalfield, Scott and Wise counties, Va., 

 M. R. Campbell and E. G. Woodruff; The eastern part of the Bull Mountain 

 coalfield, Montana, C. T. Lupton; Preliminary report of the Coos Bay coal field, 

 Oregon, J. S. Diller and M. A. Pishel; The Black Mesa coalfield, Arizona, 

 M. R. Campbell and H. E. Gregory; Coal Deposits near Pinedalle, Navajo 

 Country, Ariz., A. C. Veatch; Coal in San Benito County, Cal., M. R. Camp- 

 bell. 



