INDEX. 555 



viour to the manners of thofe who command him, 4!55. 

 Great differences in their natural difpofitions, ibid. Con- 

 dudl blind perfons with great fagacity, 456. An extraor- 

 dinary inftance of their intelligence, 457. The influence 

 of climate upon them, 465. Fattened in China for the ta- 

 ble, 474. 



Domeftication. Its effe£ls on different animals, 465. 



Dragon-fly. See libella. 



Dromedary. See camel. 



E 



Eagles. Their longevity, 514. 



Ears. See hearing and fenfes. Mufical ear a gift of Na- 

 ture, 178. 



Earth, though fpacious, is comparatively fmall, 143. 



Education much influenced bythe principle of imitation, 473. 



Eggs. Analogies between them and the feeds of plants, 46. 

 Egg of the fpider fly as large as the mother, 301. Eggs of 

 fome infedts grow after they are laid, 301, 302. Several 

 worms difcovered in the fame egg, 305. Eggs of bees im- 

 pregnated after they are depoflted in the cells, 351 . 



Elephant. Hisftrudlure, 77. His fagacity and manners, 79. 

 A more particular account of this animal, 445. A mild 

 and obedient domeftic, 447. Elephants were formerly 

 employed in war, 449. Their fenfe of fmelling very acute, 

 450. Revengeful when affronted, 452. They are fenfible 

 of good fortune, and maintain a gravity of demeanour cor- 

 refponding to the dignity of their lituation, 453. They al- 

 low themfelves to be commanded by a child, ibid. More 

 eafily tamed by mildnefs than by blows, 454. 



Ephemeron-fly lives only one day in its pfrfe<51: (late, butcon- 

 tinues three years in the water before its transformation, 

 99, 517. The nymphs refpire by gills, 132, 133. 



Evils neceffary in this world, 526. 



Expiration. See refpiration. 



Eyes. No animal, except the infedl tribes, has more than 

 two, 94. Defcription of the eye, 186. Inverted pidures 

 on the retina, 189, 190. Why feen flraight, 189. Why 

 we fee Angle with two eyes, 191. Vilion conveys no 

 idea of diflance, 192. Why near objects appear large, 

 and diflant ones fmall, 192. Origin ofghofts, &c. 192. 



