ORGANS OF HEARING. 187 
turn to a peaceful rest in the evening; another, 
while they call forth the whole hive in defence of 
the state against the attacks of enemies; another, 
while they clean their hives from filth; and an- 
other, whilst the queen-bee leads forth a swarm to 
seek new settlements. Now, I ask those who deny 
hearing to insects, what can be the use of sounds 
so variously modulated, unless the bees can by 
hearing discriminate those sounds ?” * 
“ Not once, but a hundred times, I have tried by 
experiment the acuteness of hearing in insects, as 
ften as I have delighted my mind with contem- 
plating the beauties of nature in study during the 
summer nights, destined otherwise for the purpose 
of recruiting exhausted strength. In such cases, 
how much attention is requisite to avoid disturbing 
the roaming moths, and how rapid is their flight on 
the least noise being made, even before I could have 
imagined that the noise could have reached their 
ears. 
“ Unless, therefore, every circumstance misleads 
me, the inference is correct, that there is a constant 
relation between the power of expressing various 
sounds and the power of perceiving the same; and 
this is strengthened the more as it is more clearly 
seen and proved by sad experience in the case of a 
man born deaf and dumb, which appears to prove 
* Field Naturalist’s Magazine, i, p. 295. 
