212 THE HISTORY OF SCIENCE 



REFERENCES 



Charles Darwin, A Naturalist's Journal. 



Francis Darwin, The Life and Letters of Charles Darwin. 



W. A. Locy, Biology and its Makers (third revised edition), 



chap. xix. 



G. J. Romanes, Darwin and After Darwin, vol. I. 

 A. R. Wallace, Darwinism. 

 See also John W. Judd, The Coming of Evolution (The Cambridge 



Manuals of Science and Literature). 



