276 EPITOME OF EVIDENCE ON PLEURO-PNEUMONIA. 



and effective inoculation if you kill the animal and make use of 

 the lymph immediately after death. It should be used the very 

 day, and taken from a portion of the lung that is as little 

 affected as possible, and free from pus and blood. I am sure 

 that many of the failures are due to not attending to this. 

 Reasoning from other facts, I would say that lymph taken from 

 the lung, hermetically sealed in a close bottle, would not fail ; 

 but at the same time, I would prefer the lymph taken from the 

 subject fresh, and there and then inoculated. I would not be 

 surprised if it did not take effect if kept any time. In Glas- 

 gow there is no inducement to inoculate, because the cattle 

 are kept in the byres. They do not go out to the fields. They 

 give milk, and when they do not give milk to pay their way, 

 they go straight to the slaughter-house. I do not think an 

 animal slightly diseased and inoculated would be saved, or that 

 inoculation would stay the progress of the disease. I think in 

 most cases it would intensify the natural malady. If a healthy 

 animal is inoculated with the proper lymph, it is safe ; but I 

 cannot tell for how long. Given an animal with sound lungs and 

 inoculated, and the inoculation has taken, I consider it is safe 

 to mix with other animals. I am going to allow the animals 

 that were inoculated at the college to remain and grow up, and 

 when I have an outbreak of pleuro-pneumonia, and they are 

 in milk, I will put them into a byre. I would in certain cir- 

 cumstances advise local authorities in this country to adopt 

 inoculation, and in other circumstances I would not. I think it 

 is too late to inoculate when you have got the disease in a byre, 

 for this reason, that if the animals have been in a dairy and 

 breathing the same atmosphere, if one has succumbed to the 

 disease, seeing there is an incubative period of six weeks, 

 several others will be labouring under the malady when you 

 inoculate. There is no doubt that some animals resist the dis- 

 ease for a time, and by inoculation you may save them. For 

 example, you see the result in the animals that were bought 

 for the purpose of inoculation. Only one succumbed, seven 

 remained. I will tell you how inoculation will be of use to the 

 country, and that is, make it as compulsory to inoculate calves 

 as it is to vaccinate children ; but the question is, where are 

 you to get lymph ? I have no doubt that the lymph of 

 pleuro might be preserved, possibly in the same way as vac- 

 cine lymph. If inquiry was carried out on these lines, it 

 would be attended with valuable results. If we could preserve 

 the vitality of the lymph, then we could inoculate the calves. 

 I would recommend the compulsory inoculation of all the 

 calves in the country, because I would expect that in a few 

 years we would get rid of the disease. We have stamped out 

 rinderpest, and I do not see why we should not stamp out 



