New YorK AGRICULTURAL EXPERIMENT STATION. 47 
The lameness was apparently not connected with tuberculosis 
but was probably due to accident. At least no evidence of tubercular 
lesions could be found in the affected joint. 
With the exception of Millie D. the seven diseased cows all 
gave a reaction with the tuberculin. The reaction was a sur- 
prise in the case of Aurora who had been failing very rapidly 
and was now plainly in the last stages of the disease. It is often 
stated that animals in such a condition fail to react. She was 
killed and examined shortly after the test and was as full of dis- 
eased tissue as a cow could well be conceived of being. Her lungs 
were so solid that they did not collapse after death and both body 
cavities were so covered with tubercles as fairly to obscure the mem- 
brane upon which they rested. 
Test of November, 1904.—All of the members of the sound herd 
failed to react. This herd now contained the twenty-three animals 
which were sound at the last test and two calves, both coming 
from diseased cows, making a total of 25. 
Millie D. and Lady of Loch of the six diseased animals failed to 
react. 
Test of May, 1905.—The sound herd now contained twenty-nine 
animals, of the increase 3 being due to calves from the sound herd and 
1 from the diseased. All of this herd passed the test except Aurora’s 
Fancy, leaving 28 sound animals. This was the second and the 
latest case of a member of our sound herd becoming diseased. 
This animal was the last calf dropped by Aurora at a time when 
the dam was in the advanced stages of the disease. The calf was 
always of doubtful vigor and its destruction on this account had 
been discussed. However, on account of the desirable breeding 
involved it was thought best to hold her until she had shown her 
ability as a milker. She was evidently not diseased from birth as 
she had failed to react as a yearling. Two avenues of infection 
may be suggested but neither of them seems satisfactory. The 
bull pen is in the same stable in which the young cattle are kept 
and our bull had given a typical reaction the year previous. Also 
the man who had charge of the tuberculous herd assisted in caring 
for the young cattle. The main difficulty with both explanations 
is the fact that the calf was sound at the previous test and had been 
placed in pasture immediately after and had remained there until 
