RESPIRATION OF BEES. 
minutes* and is extinguished. Ani¬ 
mals in the same situation would soon 
expire: yet how do bees survive in 
their dwelling? 
JP roofs of respiration. Exp. 1st .— 
Bees in the receiver of an air-pump 
were not affected by the first strokes 
of the piston ; but when the mercury 
fell to a quarter of an inch below the 
level of the cistern, they fell down 
motionless. Exposure to the open air 
revived them. 
Exp. 2nd. When only the head of 
a bee was plunged in mercury or wa¬ 
ter it did not seem, to suffer^ but if 
the head alone remained out of the 
fluid* the insect displayed its trunk, 
L 1 
