180 



CONTAGIOUS DISEASES. 



These appearances were startling, and if the investigator 

 had been a less eminent man than he is, he might have made 

 his conclusions from these naked eye appearances, and said 

 it was contagious pleuro ; but there were great international 

 and commercial considerations in question, as well as the 

 scientific bearing of the subject ; and Nocard did what our own 

 Government officials ought to have done, if not in 1879, at least 

 in 1891. He made further investigations, and arrived at the 

 conclusion that he had other than pleuro to deal with. He 

 found, in the first place, that the infiltration of the connective 

 tissue was less abundant, the serum less albuminous ; that the 

 tissue of the lobule in the thickened girdle of connective tissue 

 had not the uniformity of tint and consistence that characterise 

 pleuro-pneumonia lesion ; that it was harder, more manifestly 



Photo- Mlcrografh by W. Forgan. x 200. 



Fig. 6b. — Broncho-Pneumonia as seen in " Corn-Stalk " Disease, from 

 American ox slaughtered at Deptford 14th April 1891, and referred to 

 in text. 



a. Bronchial walls, epithelium desquamating and shed. 



h. Catarrhal products in tubes and vesicles. 



c. Increased fibrous tissue — fibrosis. 



hepatised in the centre than at its periphery — the invasion being 

 from the bronchial, and not from the perilobular tissue. " In pleuro " 



