CATTLE PLAGUE. 151 



expiratory muscles, and in this way gives rise to tlie interlobular 

 emphysema, which is so commonly observed in cattle plague." 

 I feel compelled to differ from Dr. Sanderson on this point; 

 my own observations leading me to the conclusion that the 

 emphysematous condition of the lungs is due to the generation 

 of gases in the interlobular lung tissue, and that the peculi- 

 arity of the breathing results from, and is not the cause of, the 

 emphysema. 



The other organs of the body do not present msmypost mortem 

 signs which may be called peculiar to the disease. The heart 

 is often covered, both externally and internally, with petechial 

 spots. — {See Plate V.) The liver is sometimes pale, sometimes 

 dark; the gall bladder is usually full of bile, and sometimes 

 covered with aphthous patches. — {See Plate IV.) The spleen is 

 usually healthy, a circumstance of great interest, says Professor 

 Gamgee, when taken in connection with the condition of this 

 organ in the typhus and typhoid fevers of man. 



The lining membrane of the vagina and uterus, like the 

 mucous membranes of other parts of the body, are deeply tinged 

 with various degrees of redness and purple, and their epithelium 

 is in a softened and semi-detached condition. 



The skins of animals suffering from cattle plague present a 

 variety of appearances, such as crusts, eruptions, pustules, and 

 elevations. In inoculated animals dermic alterations are said to 

 be pretty constant, but, as already indicated, they were absent 

 in those cases which fell under my notice whilst the disease 

 was raging in Yorkshire. They were, however, carefidly looked 

 for in every post mortem examination which I made. Dr. 

 Sanderson says that " they may be described generally as con- 

 sisting in the first place of incrustation of material exuded in 

 a soft or semi-solid state from the glandular follicles of the skm ; 

 and, secondly, of pathological changes in the superficial structures 

 nf the skin, which, without taking anything for granted as to 

 their nature, may be designated by the term eruption. Subcut- 

 aneous emphysema was not infrequent as an ante as well as a 

 2wst mortem condition. 



