104 INTRODUCTION TO SCIENCE 



on the other, have done much to bring the study 

 of evolution-problems nearer the ideal of exact 

 science. 



CLASSIFICATION ADOPTED. Combining what 

 appear to us to be the chief merits of the fore- 

 going classifications, we propose the following 

 map: 



A. ABSTRACT, FORMAL, or METHODOLOGICAL 

 SCIENCES. 



These deal with methods of inference, supply 

 intellectual instruments for investigation, and 

 test the consistency and completeness of scien- 

 tific descriptions. 



MATHEMATICS, including STATISTICS. 

 LOGIC, in the widest sense. 

 METAPHYSICS. 



B. CONCRETE, DESCRIPTIVE, or EXPERIEN- 

 TIAL SCIENCES. 



These deal with the facts of experience and 

 with inferences from these facts. They include 

 five general or fundamental sciences and a large 

 number of particulate or derivative sciences. 



B. 1. The five great fundamental sciences 

 are: 



