No. 624] MIGRATION A FACTOR IN EVOLUTION 



possibilities; and they repeat this cycle with unending 

 monotony and persistence. 



December 15, 1917. 



V. BiBLIOGEAPHY 



Abbe, C. 



1908. The Progress of Science as Illustrated by the Development of 

 Meteorology. Smithsonian Eeport for 1907, pp. 287-309. 



Adams, C. C. 



1901. Base-leveling and its Faunal Significance, with Illustrations from 

 Southeastern United States. Amer. Nat., Vol. 55, pp. 839-852. 



1904. On the Analogy between the Departure from Optimum Vital 



Conditions and Departure from Geographic Life Centers. 

 Science \ S , Vol. 19, pp. 210-211. 



1908. The Ecological Succession of Birds. The Auk, Vol. 25, pp. 



109-153. 



1909. Isle Royale as a Biotic Environment. Ann. Rep. Mich. Geol. 



Surv. for 1908, pp. 1-56. 



1913. Guide to the Study of Animal Ecology. Pp. 1-183. New York. 



1915. An Outline of the Relations of Animals to their Inland Environ- 

 ments. Bull. 111. St. Lab. Nat. Hist., Vol. 11, pp 1-32. 



1915a. An Ecological Study of Prairie and Forest Invertebrates. Bull. 

 111. St. Lab. Nat. Hist., Vol. 11, pp. 33-280. 



1915&. The Variations and Ecological Distribution of the Snails of the 

 G«nus lo. Memoirs Nat. Acad. Sci-., Vol. 12, Pt. 2, pp. 1-184. 



Bagehot, W. 



1873. Physics and Politics; or, Thoughts on the Application of the 

 Principles of "Natural Selection" and "Inheritance" to 

 Political Society. Pp. 1-224. New York. 



1911. A Universal Law. Science, N. S., Vol. 33, pp. 159-179; also 

 Jour, Amer. CJiem. Soc, Vol. 33, pp. 92-120, 1911. 

 Blackman, F. F. 



1905. Optima and Limiting Factors. Ann. of Bot., Vol. 19, pp. 281- 



295. 



1908. The Manifestations of Chemical Mechanics in the Living Plant. 

 British Asso. Adv. Sci., 1908, pp. 1-18 (separate). 

 Blackman, F. F., and Smith, A. M. 



1911. Experimental Researches on Vegetable Assimilation and Respira- 

 tion. IX., On Assimilation in Submerged Water-Plants, and 

 its Relation to the Concentration of Carbon Dioxide and other 

 Factors. Proc. Eoyai Soc, B, Vol. 83, pp. 389-412, 1910. 

 Brooks, W. K. 



1903. The Intellectual Conditions for Embryological Science. Science, 

 N. S., Vol. 15, pp. 481^92. 

 Chamberlin, T. C. 



1906. On a Possible Reversal of Deep^ea Circulation and Its Influ- 



ence on Geologic Climates. Proc. Am. Phil. Soc, Vol. 45, pp. 



