50 TRRATISE ON THE 
and in the spring my Bees got access to it, 
took all the honey and left them the empty 
comb. ‘To diversify the trial, Huber pro- 
cured four small boxes, to the apertures of 
which, large enough to admit a Bee, he fitted 
- shutters or valves, made of card-paper, which 
it was necessary should be forced open in 
order to gain admission. Honey being put 
into them, they were placed at the distance 
of two hundred paces from the apiary. In 
half an hour, Bees were seen arriving, care- 
fully traversing the boxes ; they soon disco- 
vered the openings, pressed against the 
valves, andreached the honey. This isa 
striking instance of the delicacy of smell in 
these insects, as not only was the honey quite 
concealed from view, but its odorous effluvia, 
from its being covered and disguised in the 
experiment, could not be much diffused. I 
repeated successfully similar experiments. 
Tn fact, after the first trial, I had no doubt 
of the issue of the second; for if once the 
sense of smell in the Bees acertained the ex- 
istence and situation of the honey, I had seen 
