A SKETCH OF HIS LIFE 
51 
Scientific Laboratories : An address delivered at the dedication of the biological 
laboratory. Bulletin Western Reserve University, October, 1899, 20 pp. 
(Reprinted in Bull. Johns Hopkins University, vol. 10, no. 104, November, 
1899.) 
Truth and error. Science, vol. 9, no. 213, January 27, 1899, pp. 121-126. 
1900 
The lesson of the life of Huxley. Smithsonian Report, 1900, pp. 701-711. 
Review of "Marriages of the Deaf in America, by E. A. Fay, Volta Bureau, Wash- 
ington, D. C, 1898." Pop. Sci. Monthly, January, 1900. 
1902 
Is scientific naturalism fatalism? Proc. American Philos. Soc, vol. 41, 1902. 
The intellectual conditions for the science of embryology. Science, new series, 
vol. 15, nos. 377 and 378, 1902, pp. 444-454, pp. 489^92. 
1903 
On a new genus of hydroid jellyfishes, Dichotoma. Proc. American Philos. Soc, 
vol. 42, 1903, 3 pp. 1 pi. (Read April 4. 1902). 
1905 
The oyster. A popular summary of a scientific study. (2d ed. revised.) John 
Hopkins University Press, 1905, 225 pp., 16 pis. 
1906 
Heredity and variation, logical and biological. Proc. American Philos. Soc, 
1908, 7 pp. (Read April 20, 1906). 
The afiinities of the pelagic tunicates, No. 1 : On a new Pyrosoma. Mem. National 
Acad. Sci., vol. 10, 1906, 5 pp. 2 pis. 
Dipleurosoma a new genus of Pyrosoma. Johns Hopkins University Circulars, 
1906, no. 5, pp. 98-99, 2 cuts. 
Evolution. Article in the "Reference Hand book of the Medical Sciences," 1906, 
pp. 733-736. 
1907 
Joseph Leidy. Pop. Sci. Monthly, April, 1907. 
Joseph Leidy. Pioneers of American Science. American Museum of Natural 
History, New York, April, 1907, pp. 23-25; also in Anatomical Record, No. 5, 
January 1, 1907. 
On Turritopsis nutricula (McCrady). Proc. Boston Soc. Nat. Hist., vol. 33, no. 8, 
1907, pp. 429-460. pis. 30-35. (With Samuel Rittenhouse.) 
