534? INDEX. 



Cimex. See bug. 



Cinyps. A fly whofe eggs produce galls in the oak, lOS. 



Cleanlinefs. Its importance to health, 138. 



Cock. The game cock a moft intrepid animal, 24-7. 



Cockroach. Some account of it, 100. 



Colours. The origin of the primary ones, 187. A mixture 

 of them produces whitenefs, ibid. Colour no fpecific cha- 

 racter of plants, 261, 262. Colours of animals greatly va- 

 riec;ated by domeftication, 4'66. 



Coleopterous infeCls defcribed, 98. 



Combs. See bees and wafps. 



Crabs. An account of the migration of land crabs, 502. 



Crows. Experiments on their digeftive powers, 235, 236, 

 237. Endeavour to break grain before they fwallow it, 

 236. 



Cruftaceous fifhes caft their (hells annually, 294. 



Cuckoo makes no neft, and neither hatches nor feeds her 

 young, 327. 



Culex. See gnat. 



Cuttle-fifli. Its ftruClure and manners, 109. 



D 



Death. All animals and vegetables fubje£\: to diffolution, 51, 

 292. Life cannot be fupported without the intervention 

 of death, 394. There is a wonderful balance in the fyf- 

 tem of animal deftruclion and multiplication, 397. The 

 general caufes of death, 507. 



Deer. Their artifices in efcaping the dogs, 404. 



Deity neceflarily one, 527. 



Digeftion. The organs of digeftion defcribed, 57, B8. The 

 mechanical and chemical theories of it, 230. Victuals 

 diflblved by the gaftric juice, 231. Whether the fmall 

 ftones fwallowed by birds affift their digeftion, 233. Great- 

 ly affifted by chewing, or by comminution, 236. Dr. Ste- 

 vens's experiments upon digeftion in man and other ani- 

 mals, 237. After death, the ftomach is difTolved by its 

 own gaftric juice, 240. Bees wax a refult of digeftion, 344. 



Dipterous infefts defcribed, 105. 



Docility of animals, 439, &c. 



Dog. His fenfe of fmelling extremely acute, 172. Wild 

 dogs hunt in packs, 437. Next to the elephant, the dog 

 m the moft docile animal, 454. Accommodates his beha- 



