American Fisheries Society. 79 
Dr. Henshall: The grayling are very small when hatched 
—about like whitefish fry or shad fry in size; but after being 
fed for five or six weeks you can feed them liver emulsion, and 
after that they will soon outgrow the trout. 
Mr. Cobb: I refer to the position of the food. The larger 
grayling will take their food in any place they find it, will they 
not? 
A. Why, yes, after they get to be about six weeks old; but 
they are always fed on the surface, and I am trying to devise 
some plan of mixing liver emulsion with something that will 
cause it to float longer, but I have not succeeded. 
Mr. Seymour Bower: [I desire to present for the considera- 
tion of the members a model of an automatic fry feeder. It is 
a very simple thing; in fact its extreme simplicity is one of the 
main points of recommendation. It is entirely practical, we 
have tried it, and although we have only used it about a month 
there is a marked difference in the growth of the fry in the 
trough where the device is used and in the trough at the side 
Ot it. 
The device was invented by a man who is really new at the 
business, having been employed by us only a short time, and havy- 
ing had no previous experience in this work. 
(Mr. Bower then described the feeder as follows) : 
This feeder piece dips down into the food and at every revo- 
lution of the overshot wheel the small cup spits out a little liver 
emulsion from the aperture shown in the device. Of course the 
amount of food thrown out is regulated by the size of the cup. 
It is necessary to give this some speed, otherwise it won’t throw 
the food through the aperture. By the use of this device you 
can put your food in, go away and leave it and it will not choke 
or clog. It requires almost no extra water to run it. If the 
trough is twelve or fifteen feet long it will be well to set up a 
second feeder in the center of the trough. We think it is the 
best thing of the kind we ever tried. 
This apparatus consists of a food-containing box on the in- 
side of which are placed blocks extending the whole length of 
