154 
P LEUEO-PNEUMONIA. 
Autopsy, Nov. 22d, seven months after being attacked with the disease. 
The superior middle portion of the right lung adhered to the ribs and dia¬ 
phragm, eight inches in leugth and six in width ; the lung contained a solidified 
mass. The left lung and heart were healthy, as were all of the abdominal vis¬ 
cera; no foetus in uterus, although she received the bull in June. Ihe 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 tw T o of the four cows brought from Maine had the disease from au 
exposure of twenty-four hours, to 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. 
They 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 hands for experiment, we give no 
conclusions in relation to the efiect of the disease on such animals. 
3d. It is evident that if a cow is attacked with the disease when having a 
large flow of milk, the secretion will be partially or wholly suspended, depeud- 
iug^ou the violence of the attack and the duration of the acute disease. 
4th. Three of the five cows became impregnated, the one which escaped 
the disease having the oldest foetus. 
5th. From the foregoing, (and previous observation confirms the opinion,) 
it is evident that animals which have had an attack of pleuro-pueumonia will 
fatten readily, although considerable lung tissue has been lost. 
Respectfully submitted. 
E. F. THAYER, 
For the Commissioners. 
December 27, 1865. 
COMMONWEALTH OF MASSACHUSETTS. 
To the Honorable Senate and House of Representatives of the Commonwealth of Mass¬ 
achusetts. 
The Commissioners on Contagious Diseases among Cattle, iu submitting 
their Report, congratulate the people of the Commonwealth upon the j»’obable 
extinction of the disease, (no case having come to their knowledge since October, 
1865,) which but a few years since threatened to be of so serious a character, 
viz., pleuro-pneumonia. 
