New YorK AGRICULTURAL EXPERIMENT STATION. 43 
this way we could more effectually fill the small crevices. It did 
not seem practical in this way to handle a whitewash of sufficient 
body to give satisfaction. With a power sprayer it is quite pos- 
sible that the result might be better. The caustic effect of the 
freshly-prepared whitewash is such as to destroy the germs with 
which it comes in contact. While it is a good disinfectant, as far 
as it reaches, its mechanical form is such that it does not pene- 
trate into all of the crevices where it is desirable that a disin- 
fectant should go. For this reason we had made the previous 
application of corrosive sublimate. 
PLAN FOR HANDLING THE HERDS. 
The stables having thus been rendered as free from tubercle 
bacilli as it was practical to get them, and all animals which had 
given evidence of tuberculosis having been taken out of the new 
stable, the task of producing a sound herd of equal size was begun. 
As has been explained, the plan was to prevent the disease from 
attacking any more of the sound animals if possible and to rely 
upon the healthy calves to rebuild the herd. In order to accom- 
plish this certain precautions seemed necessary. 
In the healthy herd.— The animals were kept from all contact 
with the diseased ones both in the stable and in the pasture. ‘The 
food and water supply was carefully guarded from infection by 
the germs of tuberculosis. A satisfactory water supply at the barn 
is difficult to arrange. A single diseased animal using the com- 
mon source of supply is lable to contaminate it. For a year we 
used individual pails but found it a troublesome method. 
No barn utensils of any kind were taken from the stable of 
the infected cows into that of the healthy herd without first being 
so treated as to remove the danger of carrying disease. 
So far as was practical the two herds were looked after by dif- 
ferent men. When it became necessary for a single attendant to 
work with both herds the use of a separate pair of shoes and 
outer garments in the two barns was required. 
The ventilation of the barn was adjusted with the aim of sup- 
plying an abundance of fresh air, and the exercise and food of the 
animals was arranged with the idea of keeping them in vigorous 
condition rather than of forcing a large production. 
