538 INDEX. 



&c. May be accelerated or retarded by certain circum- 

 ftances, 39. Buffon's theory of growth, 214. Nutrition 

 fuppofed to be effected by the brain and nerves, 215, 

 This notion rendered improbable, 216. More probable 

 than the nutritious particles of food are conveyed and ap- 

 plied by the arteries, 217. Bonnet's theory of germs ex- 

 amined, 219, 2 0. Our limited conceptions of the nature 

 of growth and nourifhment, 220. All animals fuppofed 

 to grow after birth, 227. The fpider-fly affords an excep- 

 tion, 227. Remarkable rapidity of growth in fome 

 "worms, 229. Animals as well as plants which quickly ar- 

 rive at maturity, foon perifh, 510. 



Gryllus. Some account of it, 100. 



Guiney-pig contracts a loofenelsj when forced to eat coleworts 

 for fome time, 224. 



H 



Habitations of animals. When not reftrained, animals uni- 

 formly build in the fame ftile, 315. Habitations and man- 

 ners of the alpine marmot, 316. Of the beaver, 317, 

 323. Of the mole, 323. Of birds, 324. Defcription of 

 the eagle's nefl, 324. Of the magpie's nefl, 325. Of the 

 titmoufe's neft, 325. Of penfile nefls, 326. Of the neft 

 of the taylor-bird, 326. Nefts of fmall birds, 328. Of 

 water-fowls, 328. Nefl of the mafon-bee 331. Of the 

 wood peircing bee, 334. Of another folitary bee, 338. 

 Of the honey bee, 340, &c. Of the wafps, 354. Of the 

 termites or wood-ants, 364. Of the common caterpillar, 

 429. Of the proceflionary caterpillar, 431. 



Hares. Their artifices in efcaping the dogs, 407. 



Health promoted by moderate laughing, 118. 



Hearing. Fifhes endowed with that fenfe, 89. The infiru- 

 ments and caufes of hearing, 175. Why infants hear- 

 bluntly, 177. The pleafures derived from hearing, 179. 

 The fource of artificial language, ibid. 



Heat. See animal heat. 



Hemipterous infers. Of their form and manners, 99. 



Herbivorous quadrupeds. See animals. Their form adapt- 

 ed to their difpofitions, 68. 



Hermaphrodites. Some infecfs are hermaphrodites, 248, 

 Many inftances of hermaphrodites among horfes, black 

 cattle, and flieep, 248, 249, 250. 



