274 PHYSIOLOGY. 



than it did in the open air. MR. HUNTER found 

 the heat of a hive vary from 73 to 84 of Fahren- 

 heit ; and HUBER, who says that in a prosperous 

 hive the thermometer in winter commonly stands 

 at from 86 to 88, and in summer between 95 

 and 97, states that he has observed it, on some 

 occasions, to rise suddenly from about 92 to above 

 104. The former naturalist, about ten o'clock in 

 the morning, in the middle of July, when the 

 quicksilver in the thermometer in the open air 

 ranged at 54, found that on plunging it into a 

 bee-hive, it rose in less than five minutes to 82. 

 At five the next morning it stood at 79, at nine 

 it had risen to 83, at one to 84 ; and at nine in 

 the evening it had fallen to 78. On the 30th of 

 December, when the temperature of the air was 

 35, that in the hive was 73. Bees also possess 

 the power of counteracting or throwing off su- 

 perabundant heat, by perspiration. HUBER ob- 

 served, that when crowded together in hot wea- 

 ther, they become much heated, and perspire so 

 copiously that those near the bottom seem per- 

 fectly drenched, and are for a time incapable of 

 flying from the moisture on their wings. 



MOTION. 



The motions of insects are performed through 

 the medium of an appropriate apparatus of mus- 

 cles, which move the head, trunk, abdomen, vis- 



