INDEX. 



A 



AAinia. See fea-nettle. 



Air, neceflary to the exiftence of all animals and vegetables, 103. Air-cells in birdy 

 defcribed, iii. Temporary rnftruments fometimes provided for its admiflion into 

 animal bodies, 121. Some animals can live long without ft, 126, 117. Air is al- 

 ways impregnated with odorous particles, 164. The medium of founds, 168. 



Amphibious^nimals. See animals. Sketch of their ftrufture and difpofitions, 65. Thtf 

 foramen ovale of their hearts continue open during life, 66. 



Analogy. See animals and plants. Analogy between birds and fi£hes, 117. Sexes of 

 plants founded on falfe analogies, 246. See fexes. 



Animal heat. An attempt to accounl for it, 1 04. 



Animalcules. Thofe obtained by infufions multiply by continued dividons and fuhdi- 

 vifions, 31. 



Animals. DiiEculty of diftinguifhing them from plants, 2. See plants. All of them 

 endowed with fenfation, 8. A iketch of their ftru£ture and organs, 14. Analogies 

 between animals and plants, originating from their ftruilure and organs, ibid — from 

 their growth and nourifhment, 24, 30. ihe food of animals compared with that of' 

 plants, 25. Analogies from their diflemination arid decay, 30, &c. Some animals 

 neither viviparous nor oviparous, 33 ; fome are both, ibid.; and fome multiply with»- 

 out impregnation, 34. Analogies between the eggs of animals and the feeds of plants, 

 35. Moft animals have th-eir feafons, 39, 280. All animals fubjeift to difeafes and 

 death, 41. Of the organs and general ftrufture of animals, 44, Structure of man, 

 ibid. Of the bones, ibfd. Of the mufcular parts, 46. Of the lungs, 47. Of the 

 ftomach and inftruments of digeftion, 48. Of the organs of generation, 49. Of the 

 brain and nerves, ji. Of the ftruiShire of quadrupeds, 5^3. The general ftrufture of 

 quadrupeds has a great refemblance to that of man, 54. Peculiarities in the ftruifture 

 of carnivorous animals, 57; and of the herbivorous tribes, 58. Sketch of the ftruc- 

 ture and difpofitions of amphibious animals, 6^. Sketch of the ftrufture of birds, 

 70. Of the ftrufture of fifhes, 77. The comparative ftrength of animals depends 

 not on ftruilure alone, loz. Of their refpiratioi, 103. Moft animals capable of 



exprefling'. 



