1 H D EX. €5i 



Tkcrer. His dlfpofitlons are grofsly ferocious, 582. 



Tit-moiife. Defcrlptlon of its nefts, 325. 



Toads. Inftances of their being found alive in the heart of 

 trees, and inclofed in folid ftones, 136, 137. Their lon- 

 gevity, 516. 



Tongue' and palate, the principal inftruments of thefenfe of 

 tafting, 173. 



Touch. See fenfes. 



Tracheae of infetfts defcribed, and their ufes, 127. 



Transformations. Every animal undergoes changes, 291 , &:c. 

 Transformation of frogs, 294. Cruftaceous animals caft 

 their Ihells annually, 291'. Serpents annually calt their 

 Ikins, 29.5. Of the transformation of infedls, ibid. Tranf- 

 formation of the filk-worm, 296 j of other caterpillars, 

 ibid. The internal parrs, as well as the external form, of 

 winged infedts undergo confidcrable changes, 299. Spider- 

 fly transformed into a chryfalis before efcaping the belly 

 of its mother, 300 The behaviour of different caterpil- 

 lars, when about to transform, 303. Transformation of 

 infefts is only the throwing off temporary coverings, 306. 

 Plants, as well as animak, undergo traasformations, 309» 

 Intentions of Nature in changing forms, 313. 

 Trochus deftroys numbers of Ihell-fiffies, 400, 

 Turkey. The great comminuting force of its ftomach, 231. 



U 



Urchin. Motions of the fea-urchin defcribed, 1 49. 



V 

 Vacuum. Sounds cannot be propagated through it, 17*. 

 Vegetables. See plants. 

 Vermes. See worms. 

 Vis inertiae defined, 144. 

 Viflon. See eyes and retina, \ 



W 

 War. Man not the only animal that makes war with his 



own fpecies, 391. n. j 



Wafp. Solitary wafp digs holes in the fand, where Ihe de- 



pofits her eggs, 1 56. Feed their young by difgorgmg like 



the pigeon, 279. Their manners and operations, 354. 



"^heir cells compofed of paper, 355. Defcription of their 



