402 INTRODUCTION TO PHILOSOPHY OF SCIENCE 



The most convenient form for the representation of such 

 a synoptic view is a Logical scheme of genus-species relations 

 like the following: 



r AKX 



(AK (aKY 



AL 

 AM 



AMR 



AMS 

 AMT 



This affords a general structure within which the various 

 disciplines may be located as superordinates, subordinates, 

 or coordinates. A table of this kind should provide a place 

 for highly general studies, such as science, philosophy, and 

 history; for the more specific disciplines, such as physics 

 and chemistry; and for the highly specialized investigations, 

 such as optics, acoustics, and electricity. The principle of 

 division need not be that of dichotomy, nor of trichotomy, 

 but will be determined, in each case, by the nature of the 

 subject matter. It would seem advisable to introduce the 

 principle of serial arrangement as well as mere classification 

 wherever the material permits, i.e., if the species of a given 

 genus exhibit ordinal properties they should take on a form 

 which clearly indicates this fact. The different levels of sub- 

 ordination may be indicated in a tabular form either by 

 means of columns or by means of rows. Where cross-classifi- 

 cation exists, i.e., where a species lies in two different genera, 

 this may often be represented by a two-dimensional pattern; 

 for example, the two divisions of biology into physiology 

 and morphology and into botany and zoology might be 

 indicated as follows: 



10 °^ y I Morphology 



Botany Zoology 



A table in which this principle is employed, however, takes 

 on a high degree of complexity, and loses its schematic form. 

 No convenient tabular representation is possible when the 

 dimensional variations exceed two. Elaborate geometrical 



