Till 



PAGE 



4. The ancients and moderns agree on this point 4* 



5,6, 7. Democ'ritus, Sextus, Empirictfs,' and Prota- 

 goras, shew, that the existence of external things 

 consist in the impressions we perceive in our- 

 selves . . 45 46 

 8, 9. A'ristippus's experiments hereon . 46 47 

 10, 11, 12. Plato and Epicurus' clearly distinguish be- 

 tween sensible qualities, and the objects which 

 cause them . 47 48 

 13. The moderns have scarcely- advanced any thing new 



on this subject . 50 " 



CHAP. VII. 



Of Animated Nature. 



3 > 2. fhe ancients understood the natural history of 



animals and minerals better than the moderns 5-1- 



3. That bodies are composed of similar and dissimilar 



particles 



4, 5, 6. Of animal and vegetable nutrition 5354 



7. Of the formation of a fetus 



8. Reflection . 56i 



CHAP. VIII. 



Nature Active and Animated. 



1, 2. That animal and vegetative substances are ori- 

 ginally the same 



