"The mathematicians are well acquainted with the difference 

 between pure science, which has to do only with ideas, and the 

 application of its laws to the use of life, in which they are con- 

 strained to submit to the imperfections of matter and the influence 

 of accident." Dr Johnson, in the fourteenth Rambler, May 5, 1750. 



"Natural History. . .is either the beginning or the end of physical 

 science." Sir John Herschel, in The Study of Natvml Philosophy, 

 p. 221, 1831. 



"I believe the day must come when the biologist will — without 

 being a mathematician — not hesitate to use mathematical analysis 

 when he requires it." Karl Pearsonf in Nature, January 17, 1901. 



