CONTENTS. I'll 



PART III. 



OF THE SUBDIVISION OF PHYSICS INTO DISTINCT BRANCHFS, 

 AND THEIR MUTUAL RELATIONS. 



CHAP. I. 



Of the Phenomena of Force, and of the Constitution of 

 Natural Bodies. - Page 221 



CHAP. II. 



Of the Communication of Motion through Bodies. Of 

 Sound and Light. - - - - 24 G 



CHAP. III. 



Of Cosmical Phenomena. ... 265 



CHAP. IV. 



Of the Examination of the material Constituents of the 

 World. - 290 



CHAP. V. 



Of the Imponderable Forms of Matter. - 310 



CHAP. VI. 



Of the Causes of the actual rapid Advance of the Physical 

 Sciences compared with their Progress at an earlier Period. 



347 



