92 
ON THE AIR OF HIVES. 
Undoubted evidence was thus ob¬ 
tained, that the bees have no sub¬ 
stitute in their hives for external air. 
CHAPTER XII. 
MODE OF RENEWING THE AIR IN HIVES, 
Bees have the property of renewing 
the air in their hive, vitiated by res¬ 
piration, and this they do in a sin¬ 
gular manner. 
During fine weather, a certain num¬ 
ber of bees always appear befoie the 
entrance of their hive, occupied in vi¬ 
brating their wings, but still more 
are to be found ventilating the in¬ 
terior. The ordinary place of venti- 
