532 I N D E Xo 



Have frequent combats, 392. Their foclety of a monar- 

 chical nature, 425. The Count de BuiFon's mechanical 

 theory of the operations of bees examined, 427, &c. 



Beetle tribe of inle^^s. An account of their form and man- 

 ners, 99. Many of them, when terrified, hmulate death, 

 158. Remarkable difi^erences between fome of the males 

 and females, 245. 



Beings fbould not be contemplated individually, but by their 

 rank, 526. None fuperior to man could exift in this world, 

 527. 



Birds. Sketch of their ftru£lure, 80. Their form adapt- 

 ed to their mode of living, 81. Of granivorous birds, 

 82, Analogy between them and herbivorous quadru- 

 peds, 84. Of carnivorous birds, 84, 386. Birds refpire 

 by almoft every part of their bodies, and even by the 

 bones, 119. One ufe of this flru^lure, 122. Analogy 

 between birds and fiflies, 125. When not reftrained, 

 Uniformly build nefts in the fame form, and of the fame 

 materials, 157. The great comminuting force of fome 

 t)f their ftomachs, 231. Whether the Imall ftones they 

 fwallow aflifl the digeftion of their food, 233. Among 

 birds of prey, the females are larger, Wronger, and more 

 beautiful, than the males, 247. The reverfe takes place 

 among the gallinaceous tribes, 247. Many of them pair, 

 282, 283. Changes they undergo after being hatched, 

 295. Of their nidification, 324, 325. Of their artifices, 

 412. Some of them may be taught articulation, 462. Of 

 their migration, 476, &c. Of their longevity, 512. 



Bifons. See oxen. 



Bletta. See Cockroach, 100. 



Blood. Its circulation conne6ted with refpiration, 117. 

 Showers of it accounted for, 308. 



Bones. Birds breathe through them, 121. 



Brackeleys, a fpecies of the ox, which are taught by the Afri- 

 cans to perform wonderful actions, 460, &c. 



Brain. See nerves. 



Brain. A fhort defcription of it, 61. The fource of all fen- 

 fation and motion, 140. Suppofed.to fecrete and diftri- 

 bute the nutritious matter of food, 217. 



Breathing. See refpiration. 



Brutes. See animals. 



Bug. Some account of it, 100. 



