INDEX. 5-J7 



difeafes, 22o. Diverfity of food ufcd by difierent fpeciei 

 one caufe of the diffulion of animals over the earth, 220'. 

 Every animal furnillied with proper inftruments for procu- 

 ring food, 228. Importance of feeding all young animali 

 well, 228. Infects which feed upon carrion never attack 

 live animals, 228. This facSt eftablifhed by experiments, 

 228, 229. Spalanzani's experiments upon the digeftioii 

 of food by various animals, 230. 



Foramen ovale. In amphibious animals it remains open da- 

 vm^ life, 76. 



Formica-leo. Its artifices and manners, 415. 



Forms are perpetually changing, 311. See transformations. 



Fox. His artifices and manners, 408. 



Frogs. Undergo great changes in their form, 294. 



Fulgora. See fire-fly. 



G • 



Gad-fly, extremely troublefome to cattle, both in its cater- 

 pillar and fly ftate, 105. 



Gall infects. Defcription of their form and manners, 245. 



Galls. See chermes. The eggs of the cinyps give rife to 

 thofe on oak leaves, 103. How galls are formed, 301. 



Gaflric juice. See digeftion and fl:omach. Its folvent 

 power aflifted by chevv'ing, 238. No dead animal fub- 

 flance can refifl: its pov/er, 238 j but it has no effe<St upon 

 living animals, 240. DiflxDlves the fl:omach after death, 

 240. 



Generation. See multiplication. 



Gentoos. Live almoft entirely on vegetables, 221. Their 

 cafts founded in Nature, 522. 



Germs. Examination of Bonnet's theory of them, 219. 

 See growth. 



Glow-worm. See worms. 



Glutton. His artifices and manners, 41 1. 



Gnat. Account of it, 105. 



Goat- fucker, a bird of paflage, 480, 



Goofe. Its longevity. 



Gordius. See worms. 



Granivorous birds. Sketch of their fl:ruclure, 82. Analo- 

 gous to herbivorous quadrupeds, 84. Their gentle man-» 

 ners, 8t. 



Growth of animals and vegetables extremely analogous, 36j 



