INDEX. 



seen almost a foot long; they differ from those of the ele- 

 phant, in that they never fall ; when the boars come to a 

 state of maturity, they dread no single creature ; their 

 position when attacked ; the manner of hunting them ; when 

 killed, the testicles cut off to prevent their tainting the 

 flesh ; was formerly a native of our country ; William the 

 Conqueror punished with the loss of their eyes such as kill- 

 ed it in his forests ; at present the wild breed is extinct, ii. 

 365, &c. The Canary boar described; the tusks being 

 broken away, the animal abates its fierceness and venery, 

 and nearly the same effect as castration is produced, 385, 

 Does not fly the approach of the lion ; combat of a lion and 

 a wild boar, in a meadow near Algiers, 409. 



Bobak, name of the marmot in Poland, iii. 161. 



Bodies, why some light bodies swim, and ponderous bodies 

 sink, i. 161. The deeper a body sinks, the greater the re- 

 sistance of the depressed fluid beneath ; how then, after it 

 is got a certain way, does it sink at all ? 164. Animal bodies 

 left to putrefy, produce air copiously, 287- Symmetry of 

 the human body ; the body of a well shaped man ought to 

 be square, 4-10. Human body often found to differ from 

 itself in size ; instance of it ; the cause ; differs also from 

 itself in weight ; instances of it, 434. Those parts furnished 

 with the greatest quantity of nerves, are first in formation, 

 ii. 20. The tone of a sonorous body made to depend upon 

 the number of its vibrations, and not the force, is taking an 

 effect for a cause, 34. Suffering is but to a certain degree ; 

 torture becoming excessive, destroys itself; and the mind 

 ceases to perceive, when the body can no longer endure, 

 70. 



Boerhaave observed to his pupils little ridges of hills in Hol- 

 land, as mountains of no small consideration, i. 118. Says, 

 if we filter and distil water a thousand times, it will deposit 

 a sediment, 145. Considered heat so prejudicial to health, 

 that he was never seen to go near a fire, 277. His con- 

 jectures of the cause of hunger, ii. 5. Said, upon poisons, 

 to teach the arts of cruelty is equivalent to committing 

 them, iv. 132. 



Boiguacu, the largest of the serpent kind in South America ; 

 sometimes forty feet in length, i. 351. Description of this 

 creature, v. 378. 



Bonassus, supposed by Klein and Buffon another name for the 

 bison, ii. 237. 



Bones, in the embryo, soft almost as the muscles and flesh ; 

 hard as the bones seem, the blood holds its current through 

 them, as through other parts of the body ; in old age more 

 solid, also more brittle, and why, ii. 59, &c. . Fossil bones 

 found pn the banks of the Ohio, in Peru, ami Brazil, iii. 

 357. 



