274 INDEX. 



Flying-fish, its description, v. 126. 



Flying-squirrel described, iii. 150. 



Fly-trap, name of a flower, closing upon the flies that light 

 upon it, vi. 172. 



Foetus, the canal of communication through which the blood 

 circulates in the foetus, without going through the lungs, 

 has been found- open in some bodies that have been dissect- 

 ed, v. 24-5. 



Fongwhang, natives of China give a fantastic description of 

 this imaginary bird, iv. 153. 



Fontenelle, a celebrated writer, of a weak and delicate habit 

 of body ; the remarkable equality of his temper lengthened 

 out his life to above a hundred ; nothing could vex or make 

 him uneasy, ii. 64. 



Food, man can live without it for seven days ; a Scotchman, 

 for the space of six weeks, took no food at all, ii. 9. 



Foramen ovale, opening in the heart of the foetus, i. 383. In 

 the seal's heart never closes, iii. 263. 



Form of hares made in places where the colour of the grass 

 most resembles that of their skin ; is open to the south in 

 winter, and to the north in summer, iii. 123. They sleep 

 or repose in them by day, ib. 



Formica-leo, the lion-ant, described ; its habits ; retreat ; con- 

 trivances for catching other insects ; when attaining a cer- 

 tain age changes its form ; description, when become a 

 large and beautiful fly of the libellula kind, vi. 8. 



Fossil, teeth of elephants often found in that state; bones found 

 in Peru and Brasil, iii. 357. Shells in the bowels of the 

 earth, not found in the ocean, v. 210. 



Fouine, animal of the weasel kind, iii. 84. 



Fowls, large, do not rise easily, and why, iv. 7. Few water- 

 fowls known to breed in England, and why,\27. Those of 

 reddish plumage the ancients held invaluable ; the white as 

 unfit for domestic purposes, and fit as prey to rapacious 

 birds ; Aristotle thinks them less fruitful than the former, 

 130. General characteristics of water-fowls ; their food; 

 the gull kind; the penguin kind; the goose kind, 355. 

 Water-fowls properly of no climate, 4-03. 



Foxes hunt in packs, iii. 6. Their cubs born blind, like those 

 of the dog ; the fox lives about twelve or fourteen years ; 

 , remarkable instance of parental affection of a she-fox ; all 

 animals make war upon the fox ; even the birds ; refuses to 

 engender with the dog ; brings forth fewer than the dog, and 

 but once a-year ; the female goes with young six weeks, and 

 seldom stirs out while pregnant ; various colours of them ; 

 three varieties of this animal in Great Britain ; greyhound- 

 fox ; mastiff-fox, and cur-fox ; round the pole they are all 

 colours ; jackall taken for the fox ; skin of the black fox 

 most esteemed, a single skin selling for forty or fifty crowns, 



