120 
quantities such as the French people state they can raise. 
There has been my trouble. I have worked not only with 
cow-dung, but with horse dung, and I have worked with 
human dung, but still I cannot get those little things in 
the quantity Idesire. I can get more than I get naturally 
but I cannot get a pond full that will keep ten thousand 
yearlings from month to month. I have been doing work 
according to this process for ten years, and I am about 
discouraged and ready to give up. 
Pror. REIGHARD—These published statements don’t 
. give the number. 
Dr. BEAN—I would like to ask the Professors if these 
towings mentioned in the paper he has just read were 
made at any particular time of the day, or whether any 
difference was found in the plankton or life in the water 
at different times of the day or in different temperatures 
of water? Every person who has gone to sea knows that 
the food of fishes which is so evident at the surface and is 
known to the fishermen as ‘‘seed,’’ ‘fish seed’ or ‘‘ ca- 
yenne,’’ disappears at certain times of the day. At certain 
times in the day it is on or near the surface and at other 
times it is down in the water. I should think that the 
same thing would hold in fresh water.. The plankton 
might be extremely abundant in one belt of water at one 
time of the day or at a certain temperature, and might be 
entirely absent at another time; therefore I would like to 
have the Professor state something about the conditions 
under which the towings were made. 
Pror. REeigHaARD—I have those conditions here. They 
are stated in the paper. 
Capt. Cottins—Inasmuch as the planting of whitefish 
fry, which has been enormous, has not apparently given the 
results that have been anticipated or at least hoped for, I 
think these facts which are presented by Prof. Reighard 
are very interesting. . 
In this connection I would like to hear from the gentle- 
