160 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
Rickard, T. A., and others. 
2056. After earthquake and fire. A reprint of the articles and editorial com- 
ment appearing in the Mining and Scientific Tress immediately after the dis- 
aster at San Francisco, April 18, 1906. San Francisco, Mining and Scientific 
Press, 1906. 191 pp., illus. 
A reprint of papers appearing in the Mining and Scientific Press in the issues of April 
28, May 5, and June 16, in the main relating to the California earthquake. 
Ries, Heinrich. 
2057. Clays: their occurrence, properties, and uses. With especial reference 
to those of the United States. New York, John Wiley & Sons, 1906. 490 pp., 
44 pis., 65 figs. 
2058. The clays of Texas.— Am. Inst. Min. Eng., Bi-Mo. Bull. no. 11, pp. 767- 
805, 9 figs., September, 1906; Trans., vol. 37, pp. 520-558, 9 figs., 1907. 
Describes the geologic horizons and geographic distribution of the clays of Texas, and 
their composition, classification, and properties. 
2059. The clays of Wisconsin and their uses. — Wisconsin Geol. and Nat. 
Hist. Survey, Bull. no. 15, pp. 1-191, 19 pis., 5 figs., 1906. 
2060. The clays of the Virginia coastal plain. — Virginia Geol. Survey, Geol. 
Ser.. Bull. no. 2. pp. 25-176, 15 pis., 10 figs., 1906. 
Describes the origin, composition, properties, and classification of clays, and gives a 
detailed account of the Virginia coastal plain localities producing clays. 
2061. Economic geology of the United States. Second edition. New York, 
The Macmillan Company, 1907. 451 pp., 25 pis., 07 figs. 
2062. What should be embraced in a geological study and report on clays? — 
Am. Ceramic Soc, Trans., vol. 9, pp. 480-482, 1907 ; 
2063. Notes on the rational composition of clay -Am. Ceramic Soc, Trans., 
vol. 9. pp. 772-776, 1907. 
2064. Clays of Virginia. — In Watson, \ , ij., Mineral resources of Virginia, 
pp. 167-187, 6 pis., 1907. 
Extracted from Bulletin no. 2, Virginia Geol. Survey. See no. 20G0. 
Ries, Heinrich, and Gallup, F. L. 
2065. Report on the molding sands of Wisconsin.— Wisconsin Geol. and Nat. 
Hist. Survey, Bull. no. 15, pp. 192-247, 11 pis., 2 figs., 1906. 
Bigg's, Elmer S. 
2066. The carapace and plastron of Basilemys sinuosus, a new fossil tortoise 
from the Laramie beds of Montana. — Field Columbian Mus., Geol. Ser., vol. 2, 
no. 7, pp. 249-256, 3 pis., 1906. 
Ritter, Etienne A. 
2067. The genesis of mineral waters: a discussion of their relations to vol- 
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pp. 869-870, November 10, 1906. 
2068. Le tremblement de terre de San Francisco du 18 avril 190(5. — Sec. 
geol. de France, Bull.. 4° ser., t. 6, no. 4-5, pp. 287-293, 1 fig., 1906. 
2069. Les basins lignitiferes et houillers des Montagnes Rocheuses. — Annales 
ties Mines, 10" ser., t. 10, livr. 7, pp. 5-84, 1906. 
An account of the coal beds of the Rocky Mountains. 
2070. The origin of ore deposits. Edition 3. Denver, Colorado, 1907. 84 pp. 
17 figs. 
Roberts, Milnor, and others. 
2071. The School of Mines series of rock specimens from the State of Wash- 
ington, collected and described by the School of Mines of the University of 
Washington.— Washington Univ., Bull., ser. 2, no. 25, 40 pp., January, 1906. 
