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UNITED STATES DEPARTMENT OF AGRICULTURE 
BUREAU OF BIOLOGICAL SURVEY, 
WASHINGTON, D. C. 
Hay 22, 1915. 
Hr . .ilex Vetmore, 
Corinne, Utah. 
Dear Hr. W etmore : 
Dr. IT. A. Cobb, 3ureau of Plant Industry, for whom, if you re- 
member, you collected a bottle or two of staff from Bear River, asked 
mo if it would not be possible for you to secure some surface mud or 
ooze for him from Salt Lake proper, as ho has never had an opportunity 
to examine the material from the lake proper for nematodes. If you 
have an opportunity, it might be well for you to collect two lots, 
one from decidedly brackish water and the other from somewhere within 
the limits of the lake itself. There is no hurry about the matter, 
but no doubt during the season opportunities will occur for either 
yourself or an assistant to collect the desired material, and I desire, 
of course, to cooperate so far as we can with all the other bureaus 
in the procuring of field material for examination. If Doctor Cobb 
want s the material collected in any particular maimer, or preserved 
in special solutions, I will ask him to forward containers and the 
necessary fluid, but I suspect that the water of Balt Lake will pre- 
serve from decomposition anything that may be found in it. 
I suppose you have hardly as yet gotten fairly into your work, 
but hope to hear soon that you are making good progress with it. 
Very truly yours 
