78 Thirty-Third Annual Meeting 
vance, by keeping them filled with creek water with a sluggish 
current, in order to favor an accumulation of the small organ- 
isms natural to the stream. 
DISCUSSION. 
Mr. Titcomb: That is a very interesting paper, as was Dr, 
Henshall’s previous paper on feeding blood. I do not know 
whether I gathered fully one point, and therefore raise this in- 
quiry: the principal point, Doctor, in the feeding described in 
this paper, is not in the class of food but in the method of giy- 
ing it, is not that true? 
Dr. Henshall: Yes, to a certam extent. The paper on 
blood was complete as far as it went. 
(). You continue the same food ? 
A. Yes, but now I have a little different method of pre- 
senting it. 
Mr. Jones: I would like to ask how the cost of blood com- 
pares with the cost of beef liver. 

Dr. Henshall: I pay nothing for the blood. 
Mr. Jones: It is pretty cheap then. (Laughter.) 
Dr. Henshall: I have a butcher who understands how to 
do it. The blood must be stirred very carefully just as soon as | 
it is taken from the animal, until it is reduced to a homegeneous 
mixture. 
Mr. Jones: We pay 31% cents a pound for beef liver, and | 
if we can get the blood at a less cost we shall be glad to use it. 
Dr. Henshall: I pay 3 cents a pound for liver, and I “set 
em up” to the butcher once in a while for the blood. (Laughter. ) 
Mr. Cobb: He speaks of the different ways in which the 
trout and grayling take their food. He says he would use this 
method of feeding until they will take food the same as trout. 
How long will this different method be required ? 
