104 ESSAYS OF A BIOLOGIST 



Roux, W., '81. "Der Kampf der Teile im Organismics." 

 1881. 



Sherrington, '22. "The Advancement of Science, 1922." 

 London, 1922. 



Spencer, Herbert. "First Principles," "Principles of Biol- 

 ogy," "Principles of Sociology." 



Thorndike, E. L., '11. "Animal Intelligence." New 

 York, 1911. 



Trotter, W., '19. "Instincts of the Herd in Peace and 

 War" (2nd Ed.). London, 1919. 



Wells, H. G., '21. "The Outline of History." London, 

 1921. 



