56 THE PRxVCTICE OF VETERINARY MEDICINE. 



before the profession in a prominent light by Eutherford of 

 Edinburgh, who regards the disease as an eruptive fever, 

 with a tendency to localise itself in the lungs. Inoculation 

 does not produce the disease, but produces a fever which is 

 easily overcome, after which the animal is safe from pleuro- 

 pneumonia. The animal may be inoculated at any season, 

 but the most suitable time is during the months of June, 

 July, or August. The method of inoculation is as follows. 

 The virus is obtained from an animal that has recently died 

 of the disease. A small opening being made into the 

 diseased lung, lymph exudes into the cavity. This lymph, 

 which should be perfectly liquid, clear, and free from 

 frothiness or viscidity, contains the contagious principle 

 in a well-marked degree. The hair is to be clipped 

 from the tail of the animal to be inoculated for a 

 space of about four inches, after which a seton needle is to 

 be inserted beneath the skin, under which it is to be passed 

 along for a distance of three or four inches, then out, having 

 drawn after it a piece of worsted thread saturated with the 

 diseased lymph or virus mentioned above. About the third 

 or fourth day afterwards there is observed irritation of the 

 part, and swelling in a well marked degree. Sulph. flor. is 

 administered in small doses as an alterative. About the 

 ninth or tenth day the temperature is heightened, and, if a 

 milch cow, the secretion of milk becomes impaired. Some 

 of the untoward results of inoculation are death (which 

 occurs in a very small percentage, about two per cent, of 

 the inoculated animals dying) and loss of a portion of the 

 tail. In some cases it is advisable to remove a portion of 

 the tail with the docking shears. 



Pleuro-pneumonia Sporadic. — This form of pleuro-pneu- 

 monia is caused by draughts, exposure to cold and wet, 

 sudden changes of temperature, foul air, etc. 



Symptoms. — There is an increase in the number of 



