188 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1901. 
U. S. Geological Survey — Continued. 
(Abrasive materials.) 
Abrasive materials, by Douglas B. Sterrett, pp. 1043-1054. 
(Chemical materials.) 
Arsenic, by Frank L. Hess, pp. 1055-1058. 
Barytes, with a note on strontium, by Ernest F. Burchard, pp. 1100-1114. 
Borax, by Charles G. Yale. pp. 1050-1062. 
Fluorspar and cryolite, by Ernest F. Burchard, pp. 1063-1067. i 
Gypsum and gypsum products, by Ernest F. Burchard, pp. 1069-1078. 
Mineral paints, pp. 1115-1122. 
Phosphate rock and phosphorus : 
Phosphate rock, by Myron L. Fuller, pp. 1070-1084. 
Phosphorus, by George W. Stose. pp. 1084-1090. 
Salt and bromide, by A. T. Coons, pp. 1091-1101. 
Sulphur and pyrite, pp. 1103-1108. 
(Miscellaneous.) 
Asbestos, by J. S. Piller, pp. 1123-1129. 
Asphalt and bituminous rock, by Joseph A. Taff, pp. 1131-1137. 
Graphite, by George Otis Smith, pp. 1130-1143. 
Magnesite, by Charles G. Yale. pp. 1145 1147. 
Mica, by Douglas B. Sterrett, pp. 1149-1163. 
Mineral waters, by Samuel Sanford. pp. 1165-1104. 
Monazite and zircon, by Douglas B. Sterrett, 1195-1209. 
Peat, by Marius R. Campbell, pp. 1211-1212. 
Precious stones, by Douglas B. Sterrett. pp. 1213-1252. 
Quartz (flint) and feldspar, by Edson S. Bastin, pp. 1253-1270. 
Selenium, by Frank L. Hess, p. 1271. 
Talc and soapstone, by Arthur J. Collier, pp. 1273-127."). 
Contributions to economic geology. 1905. — TJ. S. Geol. Survey, Bull. no. 285, 
506 pp., 13 pis.. 16 tigs., 1906. 
The papers in this bulletin have been listed under the individual authors. 
Contributions to economic geology, 1906. Part I. Metals and nonmetals, ex- 
cept fuels.— U. S. Geol. Survey, Bull. no. 315, 505 pp., 4 pis., 20 figs., 1907. 
The papers in this bulletin have been listed under the individual authors. 
Contributions to economic geology, 1906. Part II. Coal, lignite, and peat. — 
U. S. Geol. Survey, Bull. no. 316, 543 pp., 23 pis., 6 figs., 1907. 
The papers in this bulletin have been listed under the individual authors. 
Report on progress of investigations of mineral resources of Alaska in 1906. — 
See Brooks, A. H., and others. 
Vallat, B. W. 
2420. The iron ores and system of mining at Sunrise mine, Wyoming.— 
Colorado Sci. Soc, Proc, vol. 8, pp. 315-322, 6 pis., 1907. 
Van Hise, Charles Richard. 
2421. The problems of geology. — Congress of Arts and Science, Universal 
Exposition, St. Louis, 1904, vol. 4, pp. 525-548, 1906. 
2422. The geology of the Cobalt district [Ontario]. — Abstract: Canadian 
Min. Jour., vol. 28, no. 4 (new ser., vol. 1, no. 2), pp. 44^5, April 1, 1907. 
Discusses the origin of the silver-cobalt ores, and their geologic relations. 
Report of a special committee on the correlation of the pre-Cambrian rocks 
of the Adirondack Mountains, the " original Laurentian area " of Canada, and 
eastern Ontario. — See Adams and others, no. 13. 
Van Horn, F. B. 
2423. The mineral production of Illinois in 1905.— Illinois State Geol. Sur- 
vey, 14 pp. 1906. 
2424. Limestones available for fertilizers.— Illinois State Geol. Survey, Bull, 
no. 4. pp. 177-183, 1907. 
