American Fisheries Society 181 



Mr. Crreen : I may state that we tried the same experiment 

 at White Plains, not only with manure, but muck. While, of 

 course these experiments have not been extensively carried on, 

 so far we believe muck is better than manure; we can see quite a 

 growtli of moss and ehara and plants of that kind. 



Mr. Clark : I do not think that the manure which we spread 

 increased the vc',a-c1ation. I think it was a little lighter this year 

 than last, the moss was a little thinner in the pond than last 

 year. 1 think there is something about manure that produces 

 more life. 



President: Any furtlier discussion of Dr. Smitlfs Daju-r? 

 My recollection is that the Germans followed that method ol' 

 putting manure in the bottom of ponds for a good wliile. in 

 raising daphnias, copepodas and things of that sort. 



Mr. Lydell : He speaks in tliat paper, in regard to spreading 

 it around on his pond the following year, and that it is throwing 

 away a very vahtable product. AVe take tons of that stuff out of 

 our ponds and throw it away. According to that paper it is a 

 very vahtable thing. 



Mr. ( 'lark : It is absolutely necessary to rake and clear it up 

 in order to get our bass fingerlings out. but this year we threw 

 it over — the balance in one pond — we have not started on the 

 other pond — and after it sort of settled down and got in such 

 condition that avc could, we spread it out and filled the pond up, 

 instead of throwing it away. 



Professor A. D. ^lead, Providence, E. I. : I am interested 

 in one (^ther point, the Japanese method of aeration of water. 

 I have been trying to keep alive marine animals of various kinds. 

 ^[y idea is to have the water shallow, rather two inches than two 

 feet. Tlu' I'elative amount of sm-fac-c to the N'olunic of water, 

 seems to he the important tiling, I lunc been a!)lo to kee]) young 

 lo1)sters for se\'era] months witliout cbangc of water in a shallow 

 dish with large surface'. 



Professor Smith: This suggests a change in the sbape of 

 our fish trans]wrtating cans. It -ieems to me that for some ]nir- 

 poses, onr cans are too deep and the fishes at the bottom suffei'. 



