BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 61 
Davis, William Morris — Continued. 
676. The systematic study of mountains.— Science, new ser., vol. 25, p. :;«.»»;, 
March 8, 1907. 
677. The terraces of the Maryland coastal plain. — Science, new ser., vol. '27,, 
pp. 701-707, May 3, 1907. 
678. Hanging valleys.— Science, new ser., vol. 25, pp. 835-836, 3 figs., May 
24, 1907. 
679. Current notes on land forms: The wolds and vales of bolted coastal 
plains. — Science, new ser., vol. 25, pp. 947-948, June 14, 1907. 
680. Current notes «n land forms: Southern Arkansas and northern Louisi- 
ana. — Science, new ser., vol. 25, pp. 948-949, June 14, 1907. 
681. Current notes on land forms: Earthquake fissures and scarps; fault 
scarps and fault-line scarps. — Science, new ser.. vol. 26, pp. 90-92, July 19. 1907. 
682. Current notes on land forms: Pit craters in Mexico. — Science, new 
ser., vol. 26, p. 226, August 16, 1907. 
Davison, Charles. 
683. The San Francisco earthquake of April 18.— Nature, vol. 7:;. pp. 608 610, 
April 26. 1906. Sci. Am. Suppl., vol. 61, pp. 25416-25417, May 26, 1906. 
684. The Kingston earthquake. — Nature, vol. 75, p. 296. January 24. 1907. 
Davison, John M. 
685. Quartz nodule with radiate structure. — Rochester Acad. Sci., Proc, 
vol. 3, pp. 268-269, 1906. 
The Estacado aerolite. — See Howard and Davison, no. 1242. 
Dawson, George M. 
686. Note on the geological structure of the Selkirk Range (extract from 
Bulletin of the Geological Society of America, vol. 2, pp. 165-176, 1891). — In 
Wheeler, A. O., The Selkirk Range, vol. 1, Ottawa, Government Printing 
Bureau, 1905, pp. 405-409, 1 fig. 
Day, Arthur L. 
687. Mineral solution and fusion under high temperatures and pressures. — 
Carnegie Inst, of Washington, Yearb. no. 4, 1905, pp. 224-230, 1906. 
Details methods and progress of experimentation upon certain groups of minerals. 
688. Investigation of mineral solution and fusion under high temperatures 
and pressures. — Carnegie Inst, of Washington, Yearb. no. 5. pp. 177-185, L907. 
689. Methods of igneous intrusion. — Abstract: Science, new ser., vol. 25, 
j). (522, April 19, 1907. 
Day. Arthur I.., Allen, E. T., Shepherd, E. S.. White, W. P.. and Wright, 
Fred. Eugene. 
690. Die Kalkkieselreihe der Minerale. — Tschermak's Mineral, u. Petrog. 
Mitt. (N. F.), Bd. 26, Heft 3, pp. 169-232, 1907. 
Describes experiments upon the melting points of the lime silica series of minerals. 
Day, Arthur L., and Shepherd, E. S. 
691. The lime-silica series of minerals. — Am. Chem. Soc, Jour., vol. 28, 
no. 10, pp. 1089-1114, 2 figs., September, 1906. 
692. The lime-silica series of minerals. With optical study by Fred F. 
Wright— Am. Jour. Sci., 4th ser.. vol. 22. pp. 265-302, 1 ti.-s.. October. L906. 
693. Discussion of paper by T. T. Read: The phase rule and conceptions of 
Igneous magma.— Econ. Geology, vol. 1, no. 3, pp. 286-289, December-January, 
1905-1906. 
