32 S WISCONSIN STATE AG HI CULTURAL SOCIETY. 
clusively herbiverous, making that term include those that live 
upon grain, seeds and fruits, as well as green vegetation. 
Those that were exclusively or chiefly insectivorous reached 
66 § per cent., against 33-J- per cent, that were exclusively or 
chiefly herbivorous. 
Of insects, those found feeding upon valuable plants, com¬ 
pared with those feeding upon valueless or noxious plants, stood 
in the ratio of 53 to 47. Those feeding upon valuable plants, or 
attacking our friends, in other words, our enemies were 52-J- per 
cent, of the whole, there being 47-J per cent, that either fed upon 
valueless plants or preyed upon our enemies. 
It should be borne in mind that the times and localities of these 
observations were controlled by the demands of other work, and 
that they may not, and probably do not, represent the true pro¬ 
portions as they would be shown if the observations were ex¬ 
haustive. But here, as with other topics, I have only designed 
to show the nature and bearing of the work done and the ideas 
that have controlled it. Little more than a beginning has been 
made in any direction, but it is hoped that the nature of the 
work is such as will best subserve the interests of agriculture, and 
that in the progress of the survey valuable results will be at¬ 
tained. 
This paper was listened to with great pleasure, as the Professor 
showed the beauties connected with the geological survey of the 
state and their intimate relations with agriculture. It will pay a 
studied and careful reading. 
FISH OF WISCONSIN. 
THEIR ECONOMIC VALUE AND ARTIFICIAL PROPAGATION BY 
MEANS OF WHICH OUR INLAND LAKES AND RIVERS COULD 
BE ABUNDANTLY STOCKED. 
BY R. P. HOY, M. D., RACINE. 
Fish are cold blooded aquatic vertebrates, having fins as organs 
of progression. They have a two-chambered heart; their bodies 
mostly covered with scales, yet a few are entirely naked like cat- 
