FOWL CHOLERA. 
153 
Sec. 9. For the purpose of carrying out the provisions of this 
act the sum of eight thousand dollars ($8,000), or so much thereof 
as is necessary, is hereby appropriated out of the State Treasury 
to be paid as hereby provided out of any sums not otherwise ap¬ 
propriated. 
FOWL CHOLERA. 
Department of Agriculture, ^ 
Washington, D. C., February 23, 1881 . ^ 
To whom it may concern : 
\ 
I deem it advisable at this time to issue, in advance of the 
annual publication of the Department, the following brief but 
important paper, giving the results of some recent experiments 
made, under the direction of the Department of Agriculture, by 
D. E. Salmon, D.Y.M., for the prevention of what is commonly 
known as chicken cholera. A detailed report of the investigation 
will be contained in the forthcoming annual publications of the 
Department. 
Wm. G. LeDuc, 
Commissioner of Agriculture. 
PREVENTION OF FOWL CHOLERA. 
Although the cholera of fowls is an exceedingly virulent and 
fatal disease, destroying vast numbers of birds of different species, 
and remaining on premises for years after being once introduced, 
we are satisfied, after a long series of experiments, that there are 
points in its natural history which enable us to control it with 
comparative ease and with a considerable degree of certainty 
These points are : 
1. The virus is not diffusihle. —That is, the disease germs are 
seldom, if ever, taken up by the air and carried any consider¬ 
able distance to produce the malady. The virus remains in the 
fixed form, and is generally, if not always, taken into the body 
with the food; it is distributed over the grounds, feeding 
