162 
GEORGE N. KINNELL. 
(4) The doors and windows being shnt tight, the atmos¬ 
phere was saturated with the fumes of burning sulphur for a 
period of two nights and one day. 
(5) The doors and windows were then thrown open to the 
light and air and left so for a week. 
(6) The place was dried, the entire woodwork sandpapered 
and submitted to two coats of hard varnish. 
(7) And to all this I would say the work was done reli¬ 
giously and well. 
In the bull pen there was an extra lining of heavy rough 
boards. These were removed and burned, but apart from this 
none of the woodwork was either removed or destroyed. In 
order to avoid danger of poisoning from the bichloride of mercury 
solution, the mangers were again washed out with simple warm 
water. 
The animals were then taken back into the stable and the 
herd replenished with tested cows from the farm of Mr. W. K. 
Vanderbilt on Long Island. Since then the herd has been self- 
sustaining. The original young stock have, as they developed, 
been introduced into the dairy, and other young stock have 
been born and grown up to take their proper place among the 
milch cows, but during all these years, no symptoms or evi¬ 
dences of tuberculosis have developed or been found either 
among the original or among the introduced stock. This nega¬ 
tive evidence must be admitted as of some value, but apart 
from it we have as the years went past been able to accumulate 
a large amount of positive evidence which is of much greater 
value as a proof that the herd is free from disease. Thus dur¬ 
ing the last three years several of the cows have been killed for 
beef, and inspection at time of slaughter failed to reveal any of 
the lesions of tuberculosis. In the month of September, 1897, 
seven of the milch cows died from or were killed on account of 
poisoning with white lead. In all these cases a careful post¬ 
mortem examination for the lesions of tuberculosis was con¬ 
ducted, but no lesions were discovered. The following table 
shows the animals that have been killed or have died : 
