CLASSIFICATION OF SCIENCES 99 



physical laws has been termed Etiology. It would 

 be perhaps better to call it Bio-physics." 



But the term Etiology is already in recognized 

 use for a biological inquiry into the factors in 

 organic evolution, such as variation and heredity, 

 selection and isolation, and it will remain a sound 

 branch of the biological tree even though no 

 success rewards the attempt to describe evolution 

 in terms of the laws of physics. 



Prof. Pearson's idea is different. Just as 

 Applied Mathematics is "the process of analysing 

 inorganic phenomena by aid of ideal elementary 

 motions," and thus links Abstract to Concrete 

 Science, so Bio-physics attempts to link the 

 Physical and Biological Sciences together. 



Pearson presents this view in a scheme: 



Applied [ABSTRACT SCIENCE 



Mathematics \ 



a cross-link I CONCRETE SCIENCE 



PHYSICS BIOLOGY 



- y 



Bio-physics a cross-link 



"Applied Mathematics and Bio-physics are thus 

 the two links between the three great divisions of 



