424 The cost and value of Insect Collections. 
between the two great objects of collections, the advance- 
ment of knowledge and its diffusion. But it will be clear 
to all entomologists that the number of persons who 
would derive direct pleasure and satisfaction from the 
existence of an adequate public collection of insects for 
the advancement of knowledge is by no means incon- 
siderable. 
It thus appears that though it is not worth while for a 
private individual to make a collection of insects, yet a 
public collection, if efficient, would offer a good value in 
return for its cost. 
