18 GEORGE FERDINAND BECKER— MERRILL [MEM0IR ^voi!S 



The Witwatersrand banket, with notes on other gold-bearing pudding stones: Reviewed in Zeit. fur prak. Geol., 



Heft. 6, pp. 212-217, 1898. 

 Reconnaissance of the gold fields of southern Alaska, with some notes on general geology: U. S. Geol. Survey, 



18th Ann. Rept., pt. 3, pp. 1-86, pis. 1-31, figs. 1-6, 1898. 



1900 



Rights and wrongs in South Africa: The Forum, vol. 29, no. 1, pp. 31-37, Mar., 1900. 

 Are the Philippines worth having?: Scribner's Mag., vol. 27, no. 6, pp. 739-752, illus., June, 1900. 

 Brief memorandum on the geology of the Philippine Islands: U. S. Geol. Survey, 20th Ann. Rept., pt. 2, pp. 

 3-7, 1900. 



1901 



President McKinley's death; a memorial address: Ticonderoga Sentinel, week of Sept. 15, 1901. 



Conditions requisite to our success in the Philippine Islands: Am. Geog. Soc, Bull., vol. 33, pp. 112-123, Apr., 



1901. 

 Report on the geology of the Philippine Islands, followed by a version of "Ueber Tertiare fossilien von den 



Philippinen" (1895) by K. Martin: U. S. Geol. Survey, 21st Ann. Rept., pt. 3, pp. 493-625, 3 pis., 2 figs., 



1901. Abstract, Am. Geol., vol. 28, pp. 126-127, 1901. 



1903 



Project for a geophysical laboratory; appendix I to report of Advisory Committee on Geophysics: Carnegie 

 Inst, of Washington, Yearb. no. 1, pp. 44-58, 1903. 



1904 



How small an army we need. [Seen only in manuscript — written in 1904 — not found in print.] 

 Construction of geophysical laboratory: Carnegie Inst, of Wash., Yearb. No. 2, 1903, pp. 185-194, 1904. 

 Experiments on schistosity and slaty cleavage: U. S. Geol. Survey, Bull. No. 241, 34 pp., 7 pis., 1904. 

 Present problems of geophysics: Science, new ser., vol. 20, pp. 545-556, Oct. 28, 1904; Eng. and Min. Jour., 

 vol. 78, pp. 743-744, Nov. 10, 1904 (in part). Am. Geol., vol. 35, pp. 4-22, Jan., 1905. 



1905 



Simultaneous joints: Eng. and Min. Jour., vol. 79, pp. 1182-1184, 9 figs., June 22, 1905. Washington Acad. 



Sci., Proc, vol. 7, pp. 267-275, 1 pi., July 24, 1905. 

 A feature of May6n volcano: Wash. Acad. Sci., vol. 7, pp. 277-282, pi. 13, July 24, 1905. 

 Introduction to Day and Allen's "Isomorphism and thermal properties of the feldspars": Carnegie Inst., 



Washington, Pub. No. 31, pp. 5-12, 1905. 



(and Day, A. L.) The linear force of growing crystals: Washington Acad. Sci., Proc, vol. 7, pp. 283-288, 



1 fig., July 24, 1905. 



(and Day, A. L.) An interesting pseudosolid: Washington Acad. Sci., Proc, vol. 7, pp. 289-299, pi. 



14, July 24, 1905. 



1906 



Present problems of geophysics: Congress of Arts and Science, Universal Exposition, St. Louis, 1904, vol. 4, 

 pp. 508-522, 1906. 



1907 



Current theories of slaty cleavage: Am. Jour. Sci., 4th ser., vol. 24, pp. 1-17, 6 figs., July, 1907. Abstract: 



Science, new ser., vol. 25, pp. 967-968, June 21, 1907. 

 Methods of igneous intrusion (abstract) : Science, new ser., vol. 25, p. 622, Apr. 19, 1907. 



1908 



Relations of radioactivity to cosmogony and geology: Geol. Soc. Am., Bull., vol. 19, pp. 113-146, June, 1908. 

 Age of a cooling globe in which the initial temperature increases directly as the distance from the surface: 

 Science, new ser., vol. 27, pp. 227-233, Feb. 7, p. 392, Mar. 6, 1908. 



1909 



Origin of the gold of the Rand gold field: Ec. Geology, vol. 4, pp. 373-384, June, 1909. 



Half a century in geology; progress made since Agassiz discovered glacial period; New York Times, Section of 



Astronomy and Meteorology, Sunday, Dec. 12, 1909. 

 (and Van Orstrand, C. E.) Hyperbolic functions: Smithsonian Mathematical Tables, pp. iii-li, 1-321, 



Washington, 1909. 

 Relations between local magnetic disturbances and the genesis of petroleum: U. S. Geol. Survey Bull. 401, 



24 pp., 1 pi., 1909. 



