12 BOARD OF AGRICULTURE. 



All these cows, except my own, were kept, after exposure, in 

 the same shed, but were not allowed to come in contact with 

 the remaining sick cow. They were fed on hay only. They 

 were examined daily, and their condition recorded. 



July 11. — Forty-eight days after exposure, the heifer from 

 Maine, which had been recorded as well on the previous day, 

 became sick ; she lost her appetite ; her pulse and respiration 

 increased in frequency, and she exhibited other signs of fever. 

 On the 13th, disease was discovered, by auscultation and per- 

 cussion, to exist in the left side. In about a fortnight, this 

 animal had begun to recover her appetite, and her pulse and 

 respiration improved. 



The other cows exliibited no signs of pleuro-pneumonia during 

 the time of observation. 



August 13. — The weather being very warm, the flies very 

 troublesome, and the observations having now continued eighty 

 days, the Maine cow, the Maine heifer, and the two Waltham 

 cows, were driven to Brighton, and there killed. The appear- 

 ances after death were as follows : — 



The Maine heifer was found to have well-marked pleuro- 

 pneumonia of the left chest — the disease was subsiding ; the 

 other chest healthy. 



The Maine cow perfectly healthy. 



One Waltham cow healthy, except a slight adhesion over 

 fifth rib on left side, and the spaces between the two adjoining 

 ribs which could be covered with the palm of the hand. This 

 adhesion was old, of a date much anterior to the commence- 

 ment of the experiments. 



Second Waltham cow also healthy, except an, adhesion simi- 

 lar in appearance, and equal in age and extent with that just 

 described over the fifth rib on the rig-ht side. Tha lung had 

 been mutilated by some one previous to my examination, but 

 contained no evidence of recent disease. No part of the flesh 

 of these cows was allowed to be eaten by any animal. 



Ml/ own coiu has continued perfectly healthy to this time. 



The remaining- sick coiv had apparently recovered, and on 

 the 31st of October brought forth a healthy male calf, which 

 has grown well, and remains well. Her milk is rich, and of a 

 good flavor. 



November 30 — This cow was again stalled with my own cow, 

 to commence a new experiment. 



