EPITOME OF EVIDENCE ON PLEURO-PNEUMONIA. 275 



distinct from one another. You may have a portion of encap- 

 suled lung surrounded by healthy tissue, and you are not able, 

 if fat, to make out the condition of matters. On 22nd March 

 requested to visit Salmond's, on account of a cow exhibiting 

 symptoms of something in her throat, but found no obstruction. 

 The temperature was increased, and the breathing disturbed ; 

 a.nd as pleuro-pneumonia was in the byre, she was taken away 

 and slaughtered. The 'post-nfiorteif]% examination showed a 

 lesion in the right lung upper lobe the size of two hands. The 

 inoculation had taken, and the tail had been amputated. This 

 cow was not inoculated till 16th February, and had to be inocu- 

 lated again along with other eleven animals. On 21st March 

 a brown cow, purchased at Wishaw on 9th February, exhibited 

 symptoms of pleuro-pneumonia. This is one of the three 

 cows bought at Wishaw for preventive inoculation, but as no 

 compensation would be given, I allowed her to wait till 4th 

 April. I would not have allowed her to live so long, except 

 for the inoculation, in case it should be said that I was in too 

 great a hurry. April 4th. — Brown cow again carefully ex- 

 amined ; temperature 103° ; breath catching, &c. ; ordered to be 

 slaughtered. April .5th. — Post-rmortem examination showed 

 left lung upper lobes consolidated. The upper lobe of right also 

 slightly affected. This animal was taken into the byre on the 

 9th of February, the day of purchase, but she was not inocu- 

 lated by Mr Rutherford till the 16th, so that she remained six 

 days exposed to the contagion before the preventive remedy 

 was applied. To make certain, she was again inoculated on 

 the 24th, and again on the 29th. The tail was amputated. 

 There were no cows excepting my own cow, that was inocu- 

 lated previous to going into that byre. The Ayrshire cow 

 stands as a monument of what can be done in regard to a 

 sound animal. I approve of inoculation, provided it be per- 

 formed on the animal before it has been exposed to the infec- 

 tion. This animal entered the byre, apparently healthy, on 9th 

 February, remained seven days exposed to the contagion, was 

 inoculated on the 16th, again on the 24th, and again on the 

 29th February. She remained apparently healthy till the 21st 

 March, in all two days less than six weeks. The inference is, 

 that six weeks is the incubative stage. She had apparently 

 taken the disease almost as soon as she entered the byre. She 

 was sound when introduced to the byre, but the week's delay in 

 inoculation allowed the animal to contract the disease by the 

 natural method, and therefore she was affected when inoculated. 

 My opinion is that the lymph of pleuro-pneumonia is a material 

 that requires to be handled with the very greatest care. I think 

 if it is mixed with blood or pus it will be inoperative, or if you 

 allow it to be exposed to the atmosphere. It will only give real 



