SECRETARY'S REPORT. 21 



The appetite was voracious, yet but little improvement was 

 manifest in her condition for two months, when the cough partly 

 subsided and she began to gain in flesh, and continued to do so 

 until she was slaughtered, yet no milk was secreted. No one 

 would suspect she was diseased unless she was compelled 

 to move a few steps quickly, when a fit of coughing would 

 invariably follow. 



With the first mentioned cow, but little improvement was 

 produced in her condition. 



Autopsy, Nov. 22d. — Seven months after being attacked with 

 the disease : • 



The superior portion of the right lung adhered to the ribs 

 and diaphragm, eight inches in length and six in width ; the lung 

 contained a solidified mass. The left lung and heart were 

 healthy, as were all of the abdominal viscera ; no foetus in uterus, 

 although she received the bull in June. The autopsy, of the 

 second cow, five months after the attack, showed extensive 

 adhesion of both lungs to the ribs and diaphragm, and nearly in 

 the same locality, with an incysted mass in both. The other 

 viscera were healthy. 



The results from the foregoing experiments are as follows : 



1st. That two of the four cows brought from Maine had 

 the disease from an exposure of twenty-four hours, to the two 

 animals from the herd of Levi Smith of Ashby. 



One of the four cows had the disease from a subsequent 

 exposure. The other cow escaped the disease. 



The two Weston cows were exposed for one week to two of 

 the Maine cows, fourteen days after they had been attacked with 

 the disease. 



There is no evidence that either of the Weston cows took 

 the disease from this exposure. 



Tliey were afterwards exposed to a calf which had been sick 

 but four days, for the space of fifteen days, and fifty-seven days 

 after the first day of exposure one of them was sick. Seventy-one 

 days after the exposure the second cow became sick and died. 



The autopsies disclosed the fact that both of these animals 

 had pleuro^pneumonia. 



2d. No working animals being in our liands for experiment, 

 we give no conclusions in relation to the effect of the disease on 

 such animals. 



