58 STORRS AGRICULTURAL EXPERIMENT STATION. 
the European countries such an inspection is alniost universal, 
and under such conditions there is no reason in the world why 
the animals in the reacting herd should not be used for food 
just as freely as are the animals in the non-reacting herd. 
Again, the question as to whether the animals in the react- 
ing herd should be used for breeding purposes is one of some 
importance. There seems to be no reason for rejecting ab- 
solutely the animals born in the reacting herd. As already in- 
dicated tuberculosis is only in very rare instances hereditary, 
and if the calves from the reacting animals are separated from 
their mothers by the third day, and are then brought up upon 
boiled milk there is no reason for thinking that they are likely 
to have tuberculosis. It is, of course, possible that they may 
have inherited from their mothers a slightly increased tendency 
to take the disease. The fact that the mother had tuberculosis 
indicates that her power of resistance against the disease was 
less than that of the animals in the non-reacting herd. It is 
quite possible, therefore, indeed probable, that her calves may 
in a similar way be more prone to take the disease than the 
calves from the non-reacting herd. Where it is possible, 
therefore, to use the animals from the reacting herd for 
slaughter while young, and retain only those from the non- 
reacting herd for the dairy and for breeding purposes in the 
future, such a procedure is certainly advisable. But it is not 
necessary, and with the precautions of rearing calves upon 
boiled milk and testing them with tuberculin before they are 
milked, with the non-reacting herd, there are no sufficient 
reasons why such calves should not be kept for future purposes. 
USE OF MILK OF COWS REACTING WITH, TUBLRCULIae 
A much more puzzling question arises, at least in this 
country, as to the use of the milk of the reacting herd. In 
Europe this question is one of less importance from the fact 
that the habit of sterilizing the milk has become so widespread. 
In such places the problem. is already solved. There is no 
doubt that the sterilization of milk destroys all danger of tuber- 
culous infection, and in Continental Europe it is oly necessary 
to say that the milk from the reacting herd must be sterilized, or 
at least pasteurized before it is used. The use of sterilized milk 
is becoming more and more common in European countries, 
and, therefore, the problem as to the distribution of tubercu- 
losis by means of milk is disappearing. All of the younger 
