81 CLASSIFICATION OF THE SCIENCES. 



pendent, and the Science which takes into account the 

 molecular motion received by radiation from other 

 masses. But these sub-divisions, and their sub-sub 

 divisions, will be best seen in the annexed Table III. 



That these great groups of Sciences and their re 

 spective sub-groups, fulfil the definition of a true 

 classification given at the outset, is, I think, tolerably 

 manifest. The subjects of inquiry included in each 

 primary division, have essential attributes in common 

 with one another, which they have not in common 

 with any of the subjects contained in the other pri 

 mary divisions; and they have, by consequence, a 

 greater number of common attributes in which they 

 severally agree with the colligated subjects, and dis 

 agree with the subjects otherwise colligated. Between 

 Sciences which deal with relations apart from realities, 

 and Sciences which deal with realities, the distinc 

 tion is the widest possible ; since Being, in some or 

 all of its attributes, is common to all Sciences of the 

 second class, and excluded from all Sciences of the first 

 class. The distinction between the empty forms of 

 things and the things themselves, is a distinction 

 which cannot be exceeded in degree. And when 

 we divide the Sciences which treat of realities, into 

 those which deal with their separate components and 

 those which deal with their components as united, 

 we make a profounder distinction than can exist be 

 tween the Sciences which deal with one or other order 



