EPITOME OF EVIDENCE ON PLEURO-PNEUMONIA. 265 



district ought to order slaughter, without consulting the local 

 authority. The imperial authority ought to pay if the inspector 

 acted for the public. I should say that stamping out is the 

 safest way, but it is expensive. I think that inoculation will 

 always be the cheaper way. With our present knowledge, I 

 would recommend the inoculation system, so as to keep pleuro- 

 pneumonia under control. Inoculation will rid it as permanently 

 as the stamping out, provided that this experiment succeeds. 

 My opinion is that it will. It is only by having an inquiry 

 that that can be found out. If you could get the virus culti- 

 vated, it might be applied to the whole stock of the country, 

 but I would not like to commit myself on that point. If you 

 inoculate infected herds, you do quite sufficient in keeping out 

 disease from the country. Those that succeed are kept a year 

 or two till they are fed, and they are sold to the butcher. There 

 is thus no chance of any spreading of the disease. 



Principal Walley, Royal (Dick) Veterinary College, 

 Edinburgh, called in, and examined. 



I am Principal of the Dick College, and have had over 30 years' 

 experience in reference to pleuro-pneumonia. I am not always 

 able to detect it at an early stage, simply because it is a fever, 

 and resembles in its general aspects many other fevers. Cattle 

 are subject to febrile symptoms, which may be caused by a 

 variety of circumstances. I have inoculated many animals, with 

 sometimes very good results, and sometimes very bad ones. I 

 have had some deaths from inoculation. It is impossible to 

 ascribe the cause of death in all cases. You may inoculate three 

 different lots of animals in one day, and one may take it, and 

 the other two may not take it, although inoculated in 

 the same way, and with the same virus. I think bad results 

 may be largely attributed to local causes, such as bad hygienic 

 surroundings and heat. My greatest loss was during the 

 summer ; prior to that I only lost one. In spite of all my 

 endeavours, I could not get my instructions carried out. The 

 people kept their cattle too warm. Heat increases the activity 

 of inoculation. We don't want to get them exposed during winter, 

 but it has been shown that you get more pronounced results by 

 keeping the tail at an artificial heat than otherwise. The results 

 of my observations generally have been, that if the animals are 

 inoculated immediately the disease breaks out, and if the 

 disease is detected at the earliest stage of the outbreak and 

 the animals immediately inoculated, it is very successful in 

 preventing the further spreading of the disease among them. 

 If, on the contrary, the disease has been hidden, and the animals 

 exposed for weeks or months to the infection, it is sometimes 



