New *YorK AGRICULTURAL EXPERIMENT STATION. 4I 
She was added to the sound herd. As this calf became a part of 
our herd before the real beginning of our work of breeding tuber- 
culosis it has been thought best to include her in the enumeration” 
throughout. 
During the years in which this work was in progress nine cows 
and three bull calves have been purchased. As these animals have 
not been in the herd for the full time and as they were all pur- 
chased as sound animals (although as has been noted, some be- 
came tubercular) it has seemed best that neither these cows nor 
their offspring should be considered in giving the history of our 
original herd. 
BANG ME THODVAPPLIED, 
Test of October, 1901.—After an interval of eleven months the 
entire herd was again tested, October 11-12, 1901. At this test 
all the animals remaining in the old stable reacted, with the ex- 
ception of Kittie, one of the heifers which had given a reaction 
at the previous test. Kate and Tess, two heifers which had not 
reacted in 1900, now gave an undoubted reaction. 
In the new stable the calf, Nellie, which had not-been tested 
the previous year, as well as the cow, Jane, which stood beside it, 
reacted. Two other cows in this stable, Millie D. and Lady of 
Loch, also gave a reaction. 
During the year five cows had developed the disease beside the 
calf, Nellie, which had not been.previously tested. This observa- 
tion is of interest as it gives an idea of the rate at which the dis- 
ease was spreading through the herd. 
Separation of the herd on the basis of the test.—The calf and 
the three cows in the new stable which had given a reaction with 
the tuberculin were now placed with the unsound herd. This left 
seven cows and six calves, or a total of thirteen, which had not 
given a reaction to the tuberculin test out of a total of thirty. 
This was the condition of our herd when, in October, 1901, we 
started to replace the diseased animals with sound ones by means 
of healthy heifer calves raised from the two herds. 
™® She later produced one heifer and two bull calves and her heifer dropped 
a bull calf. If any one should take exceptions to this manner of treating 
the matter they have only to deduct one from the list of sound animals at 
the beginning and two from the list at the close to obtain the corrected 
number. 
