ORGANIZATION OF THE SCIENCES 



gregation. Sidereal Astronomy deals with stel- 

 lar aggregates scattered through space just as 

 we find them. " Planetary Astronomy, cutting 

 out of this all-including aggregate that rela- 

 tively minute part constituting the solar sys- 

 tem, deals with this as a whole." Out of the 

 number of aggregates which makeup the whole 

 with which planetary astronomy thus deals, 

 Geology selects the one most easily accessible, 

 and studies that one in detail. Again, among 

 the many rearrangements of matter and motion 

 which go on upon the earth's surface, there are 

 found a number of small aggregates which Bio- 

 logy distinguishes as vital, and accordingly 

 selects as constituting its own special subject- 

 matter. Among the many functions which, 

 taken together, make up the life of these or- 

 ganic aggregates, there are sundry " specialized 

 aggregates of functions which adjust the actions 

 of organisms to the complex activities surround- 

 ing them ; " and these specialized aggregates 

 of functions form the subject-matter of Psy- 

 chology. Lastly, Sociology " considers each 

 tribe and nation as an aggregate presenting 

 multitudinous phenomena, simultaneous and 

 successive, that are held together as parts of 

 one combination." So that, from first to last, 

 the object of the concrete sciences is to describe 

 the history and formulate the modes of action 

 of actually existing aggregates, from the time 

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