119 
knowledge that it is possible to record concerning the life 
of these lakes is of importance. Not until all this has been 
done can fishculture in the lakes be carried on with a full 
knowledge of the conditions which it has to meet. The 
work can not be begun too soon, nor pushed too rapidly or 
too far. 
DISCUSSION OF PROF. REIGHARD’S PAPER. 
Pror. ReigHaRD—I want to say a word with reference 
to the remarks of Dr. Borodine, regarding artificial food 
for and the raising of these crustacea. The process is this . 
as described by a French writer. He takes dishes perhaps 
of the size of a tumbler which are filled with cow-dung, 
and over the top he places a net, and after awhile the 
diatoms, a few which may be in the water multiply in 
great numbers so they form a film or coating over this 
netting, and then any crustacea, he says, which may hap- 
pen to be in the water feed upon the diatoms and multiply 
so he gets them in enormous numbers. He suggests the 
use of that method or something like it for raising this 
whitefish food. He suggests, for instance, the digging of 
ponds and the making of troughs running from the shore 
into ponds, and shoving from the shore baskets or tubs 
containg cow-dung or other inorganic matter, getting the 
right plants which will live on that ; the plants are diatoms, 
the dead matter is cow-dung. If the French Government 
has any secret it must be in the inorganic matter with 
which you start. 
Mr. CrarK—Mr. President, I have never stated to the 
Society nor any one else, what I have done in this process, 
neither have I ever stated to any member of the U. 8. Fish 
Commission, the Commissioner nor any one else, but I have 
been working on this process for six years, unbeknown to 
anybody. But I have failed to do the work that it is 
claimed they can do. I have been working on the dung 
process entirely, but I cannot produce the food in any 
