American Fisheries Society. 109 
had wooden troughs, sides and bottom; there was no gravel 
there for the fishes to work off any parasites on, and there was 
a slime in the bottom and on the sides from the liver food. Now 
it would oceur to me that anything like that would be very 
detrimental to the health of the fish. 
Mr. L. N. Buller: It seems to me that we are drifting 
away from the point of what to feed trout. I think we are 
giving too much liver, for one thing, and if we get a more 
natural food we will overcome a great deal of this parasitic 
disease. 
Mr. Worth: It has been my opinion for a good many years, 
that it is the ponds with still waters that have acted against the 
trout. I beheve that when good trout are confined in ponds, that 
we are creating conditions which will cause parasites to develop 
on them. ‘There are members present who were at the Woods 
Hole meeting two years ago, who visited the private establish- 
ments of some of the Massachusetts trout growers; and those 
people cultivated their trout in, ditches. There were two things 
that impressed me strikingly; one was the immense amount of 
filth that was in the water from waste food, and the other was 
the immense number of hve trout that were in there. Those 
present here who were there at that time know that my state- 
ment is true. They fed on chopped Menhaden shoveled in 
almost by the wheelbarrow load, and there were bushels of that 
refuse on the bottom; and in places along the banks the refuse 
had formed a veritable skin on the bushes where bailed out, but 
their fishes were healthy and the owners were making money. 
However they had flowing water, and I believe it is the still 
water ponds that create the foundation for lce and other 
parasites. 
Mr. Clark: These fish that I spoke about in Northville 
are not in rapid water; although there are places where the 
water tumbles over quite rapidly, to which the fish can go. 
5 
Mr. Seymour Bower: I would be very glad to help out Mr. 
Whish if I could. The trouble with the whole matter is that 
what works in one case and under one set of conditions does not 
apply elsewhere under apparently the same conditions. For 
