academi 0F scences] BIBLIOGRAPHY 19 



1910 



Halley on the age of the ocean: Science, new ser., vol. 31, pp. 459-461, Mar. 25, 1910. 

 The age of the earth: Smithsonian Misc. Coll., vol. 56, no. 6, pp. 1-28, 1910. 



Reflections on Joly's method of determining the ocean's age: Science, new ser., vol. 31, pp. 509-512, Apr. 1, 

 1910. 



1911 



Some new mechanical quadratures: Philos. Mag., vol. 22, pp. 342-353. Aug., 1911. 

 A new toy motor: Science, new ser., vol. 34, p. 683, Nov. 17, 1911. 



1912 



Biographical notice of Samuel Franklin Emmons: Am. Inst. Min. Eng., Bull. no. 57, pp. 673-691, 1 pi. (port.) 



Sept., 1911; idem, Trans., vol. 42, pp. 643-661, 1 pi. (port.), 1912. 

 Major C. E. Dutton [1841-1912]: Am. Jour. Sci., 4th ser., vol. 33, pp. 387-388, Apr., 1912. 

 The Gudermannian complement and imaginary geometry: Phil. Mag., vol. 24, pp. 600-608, Oct., 1912. 



1913 



Gold production; a discussion of its effects on prices and wages; possibilities of new fields: New York Times 



Annalist, p. 120, Feb. 10, 1913. 

 Biographical notice of Samuel Franklin Emmons [reprinted from Am. Inst. Min. Eng., Trans., vol. 42, pp. 



643-661, 1 pi. (port.) 1912]. In Emmons, S. F., Ore deposits, pp. xxix-xlvii, New York, 1913. 

 The torsional theory of joints (with discussion by H. M. Home, R. W. Raymond, G. F. Becker, and C. R. 



Boyd) [reprinted from Am. Inst. Min. Eng., Trans., vol. 24, pp. 130-138, 863-867, 1895]. In Emmons, 



S. F., Ore deposits, pp. 92, 104, 1 fig., New York, 1913. 



1914 



Note on mean density of fractured rocks: Washington Acad. Sci. Jour., vol. 4, no. 15, pp. 429-431, Sept. 19, 

 1914. 



1915 



On the earth considered as a heat engine: Nat. Acad. Sci., Proc, vol. 1, no. 2, pp. 81-86, Feb.; no. 4, pp. 257- 



258, Apr., 1915. 

 Isostasy and radioactivity: Geol. Soc. Am., Bull., vol. 26, no. 1, pp. 171-204, Mar. 31, 1915; Science, new 



ser., vol. 41, pp. 157-160, Jan. 29, 1915. 



1916 



A possible origin for some spiral nebulae: Nat. Acad. Sci., Proc, vol. 2, pp. 1-8, Jan., 1916. 



(and Day, A. L.) Note on the linear force of growing crystals: Jour. Geology, vol. 24, no. 4, pp. 313— 



333, 3 figs., May-June, 1916. 

 Conservatio virium vivarum: Science, new ser., vol. 43, pp. 743-744, May 26, 1916. 



1917 



Mechanics of the Panama Canal slides: U. S. Geol. Survey, Prof. Paper 98, pp. 253-261, 3 figs., 1917. [Sep- 

 arate published July 25, 1916.] Abstract, Washington Acad. Sci., Jour., vol. 7, no. 1, p. 13, Jan. 4, 1917. 



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