14 BOARD OF AGRICULTURE. 



lung Avas healthy and weighed about five pounds, (the animal was not 

 bled.) The abdominal viscera were examined, and were found healthy. 

 By reference to first part of this Report it will be seen that the Maine 

 cow, No. 2, had never shown any symptoms of having contracted the 

 disease, and was a second time exposed to No. 1, not directly, but was 

 driven to within a few feet of her daily in going out to drink. On the 

 30th of January it was decided to feed her with meal for one month 

 and have her slaughtered, as good condition could not be maintained 

 with hay lor food. 



March 13th. — She was slaughtered and both limgs were found dis- 

 eased in the acute stage. 



The lower border of the large lobe of the right lung, seven inches in 

 length and about six in breadth, was solidified ; the left lung contained 

 a solidified portion nearly round in the inferior part of the large lobe ; 

 on the surface, in contact Avith the diaphraghm, the pleura Avas slightly 

 inflamed ; a few shreds of lymph Avere found, AA'hich A\'ould haA'e CA'entu- 

 ally formed an adhesion of the lung to the diaphragm. 



On cutting through the diseased parts, the peculiar appearance found 

 in contagious pleuro-pneumonia Avas present, the dark red lobules encir- 

 cled by the infiltrated, thickened, yelloAvish Avhite, interlobular tissue, 

 producing the marbled aspect of much brighter colors than were found 

 in the coav that died, AA'hich is accounted for from the fact that she had 

 not shown symptoms of sickness, and Avas examined immediately after 

 being slaughtered — Avhereas the other (No. 2, Weston,) AA\as sick six- 

 teen days, and AA^as not examined until eight days after death occurred. 



The results of the experiments so far are, that of the four Maine 

 cows exposed to the tAvo from Ashby, Avhich had been sick tAveh^e days 

 at the time of the exposure of No. 1, the first contracted the disease, 

 the second doubtless escaped, the third and fourth shoAved symptoms of 

 illness, but not of sufficient intensity for me to assert positively that 

 they had pleuro-pneumonia. Sixteen days after the first symptoms of 

 the disease appeared in the cows Nos. 1 and 4, the two cows at Weston 

 were exposed to them. More than seventy days passed Avithout either 

 of them becoming ill; Avhen on the 21st of November a calf which had 

 been but four days ill was placed between them and kept for two 

 weeks; both took the disease, one died; the other is alive and in a 

 thriving condition. During the sickness of the animal that died she 

 was daily driven to the yard, and passed Avithin a fcAV feet of the coav 

 No. 2, (jNIaine,) and on the fourteenth day of her illness I found her in 

 the apartment occupied by the Maine coavs. (I had unintentionally 

 neglected to shut the door two hours previous.) 



On the 13th day of March, Avhen slaughtered, both lungs of the cow 



