CHAPTER IV 



CLASSIFICATION OF THE SCIENCES 



"The divisions of the sciences are not like 

 different lines that meet in one angle, but rather 

 like the branches of trees that join in one 

 trunk." BACON. 



The Convenience and the Difficulties of Classification 

 Bacon's Classification Comte's Classification Spencer's 

 Classification Bain's Classification Karl Pearson's Clas- 

 sification Bio-physics Exact Science The Classifica- 

 tion Adopted The Interest of the Classification of the 

 Sciences The Correlation of the Sciences Summary. 



THE CONVENIENCE AND THE DIFFICULTIES 

 OF CLASSIFICATION. Science takes the whole 

 known universe for its province, and every com- 

 municable verifiable fact of experience is included 

 among its data. This is such a large order that 

 it is obviously convenient to have some classi- 

 fication. Moreover, although there is nothing 

 but mis-education to hinder an intelligent citizen 

 from having a scientific interest in many different 

 orders of facts, tastes differ, and an intellectual 

 division of labour naturally arises. As a matter 

 of fact, the long discipline which every science 

 81 



