OF RENEWING THE AIR IN HIVES, 03 
lation is on the boards those outside 
the entrance have their heads dirct- 
» 
ed towards It; those within have them 
turned in the opposite direction. These 
last are employed in expelling the 
foul air; while the former impell fresh 
air into the hive. < 
■; We may affirm that they arrange 
themselves regularly to ventilate more 
at ease: thus, they form files, ter¬ 
minating at the entrance of their hive, 
and sometimes disposed like so many 
diverging rays. 
Sometimes above twenty bees ven¬ 
tilate at the bottom of a hive; at 
other times, their number is more 
circumscribed, and their employment 
