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''(7) That tuberculin has no injurious efifect on healthy 
cattle." 
This commission recognizes that the discovery of tubercu- 
losis in animals slaughtered for food purposes furnishes one of 
the best possible means of locating the disease on the farm, and 
therefore recommends the adoption of some system of marking, 
for purposes of identification, all cattle three years and over, 
shipped for slaughter. As tuberculosis of hogs is almost invari- 
ably due to bovine infection, this recommendation should also 
be made to apply to hogs of any age shipped for slaughter." 
Among other recommendations are the following: 'Tf the 
herd is found to be extensively infected, as shown by the tuber- 
culin test or clinical examination, even the apparently healthy 
animals in it should be regarded with suspicion, until they have 
been separated from the reacting animals for at least three 
months. If, after the expiration of this time, they do not react 
to the tuberculin test, they may be considered healthy and dealt 
with accordingly. It is recommended that a herd extensively in- 
fected should not be treated by the method of general separation, 
but that the construction of a new herd from the offspring only 
is desirable. 
If the herd is found to contain a relatively small proportion 
of diseased animals, separation of the diseased animals from the 
healthy animals, and the construction of a sound herd from the 
healthy animals and the offspring of both is advocated." (As 
a working basis it is advised that herds containing fifty per cent 
or more of diseased animals be treated under the first plan, under 
fifteen per cent according to the second plan, and herds falling 
between these figures graded at the option of the owner.) That 
it shall be the prerogative of the owner to reject either plan and 
have his- herd dealt with by removal and slaughter of diseased 
animals, with or without compensation according to the public 
policy in operation. In the event of any owner re- 
fusing or neglecting to adopt either of the above methods, his 
entire herd to be closely quarantined, and sales therefrom to be 
entirely prohibited. 
That a policy of compensation be recommended as useful and 
usually necessary as a temporary measure. 
" That,. when slaughter is necessary, in order to avoid economic 
loss, every effort should be made to utilize as far as possible the 
meat of such animals as may be found fit for food on being 
slaughtered under competent inspection." 
" That, with the object of preventing the spread of infection, 
persons buying cattle for breeding purposes or milk production 
should, except when such purchases are made from disease free 
herds, which have been tested by a properly qualified person, pur- 
chase only subject to the tuberculin test. In order to assist in the 
proper carrying out of this suggestion, the commission recom- 
mends that ofiicial authorities should adopt such regulations as 
