EXPERIMENTS WITH TUBERCULOUS COWS. alee ye 
by Dr. George A. Waterman. One test was made in Septem- 
ber, 1897, by Dr. L. J. Storrs, the College being temporarily 
without a veterinarian at that time. The balance of the tests 
were made by Dr. N. S. Mayo. 
In the following paragraphs will be found a list of the tuber- 
culin tests, with the dates, and the number of the reactions after 
the cows were brought to the Station: 
January 26-27, 1897, first tuberculin test. Cows Nos. 1337, 
1341, 1343 and 1344 tested. Ad/ responded to the test. 
April 26-27, 1897, second tuberculin test. All of the cows 
tested. Vos. 1341 and 1344 responded to the test. 
July 30-31, 1897, third tuberculin test. All of the cows 
tested, but no response. 
September 27-28, 1897, fourth tuberculin test. All of the 
cows tested, but no response. 
December 17-18, 1897, fifth tuberculin test. All of the cows 
tested. No. 1344 responded to the test. 
April 11-12, 1898, sixth tuberculin test. All of the cows 
tested. Wo. 1343 responded to the test. 
December 22-23, 1898, seventh tuberculin test. All of the 
cows tested, but no response. ~ 
June 2-3, 1899, eighth tuberculin test. All the cows tested. 
No. 1343 responded to the test. 
December 1-2, 1899, ninth tuberculin test. All of the cows 
tested. Mo. 1341 responded to the test. 
March 19-20, 1900, tenth tuberculin test. All of the cows 
tested, but no response. 
| September 28-29, 1900, eleventh tuberculin test. All of the 
cows tested. No. 1341 responded to the test. 
PHYSICAL EXAMINATIONS. 
On May 8, 1898, February 7, 1899, and May 26, 1900, Dr. 
N. S. Mayo made physical examinations of the animals and 
his reports are inserted here. When these reports are com- 
pared they will be found of interest as showing the progress 
of the disease, especially in cows Nos. 1341 and 1343. 
Report of the veterinarian, May 8, 1898.—It is a fact well 
recognized that bovine tuberculosis, unless well advanced, is 
one of the most difficult diseases to diagnose upon a physical 
examination. 
