THE 

 FOUNDATIONS OF SCIENCE 



CHAPTER I 



THE CLASSIFICATION OF KNOWLEDGE 



THE Latin word scientia, from scire, to learn or know L 

 signifies, broadly, learning or knowledge. But, in 

 general usage, the modern term science has come to 

 mean an ordered knowledge of the phenomena or 

 appearances of Nature, and of the connection or 

 relations which have been discovered between them. 

 Custom and_, convenience have divided science 

 into three main sections : physical science, bio- 

 logical science, and psychological science. Al- 

 though the Greek word <wts (phusis) is perhaps 

 equivalent to the Latin word natura, the name 

 physical is confined, by general agreement, to that 

 part of science which deals wijhjnatter and energy^ (j 

 without reference to life. Biological science, on the s 

 other hand, treats of living things, and of those 

 special problems of matter and energy to which their , - 

 life gives rise. Psychological science is concerned ''. 



