PLEURO- PNEUMONIA. 183 



what we are almost forced to conclude is the same disorder, exa- 

 mines and experiments with it, as a scientist of his position and 

 responsibility should do, and — mirahile dictu — arrives at the same 

 conclusions as Williams, and even designs it by the same name.'' 



Notwithstanding this, the North of England Veterinary 

 Medical Association passed a formal resolution — " That the 

 best methods of recognising pleuro were by the naked eye and 

 hands, and that when these methods failed, little reliable 

 assistance could be obtained from the examination of micro- 

 scopic sections ; that is to say, as far as determining it to be 

 absolutely a case of pleuro -pneumonia was concerned." — 

 ( Veterinary Record, 17th December). 



At a meeting in Liverpool on 16th December 1891 a descrip- 

 tion was given by M'Fadyean of the 2^ost mortem appearance of 

 pleuro, and a careful perusal of that description will at once con- 

 vince any impartial reader that he labours very hard to prove the 

 catarrhal origin of that disease. In one passage it was stated 

 by M'Fadyean that — " The alveolar contents are by no means 

 always fibrinous in character. In many lobules the change 

 is distinctly a catarrhal one, air vesicles being filled with round 

 nucleated cells, apparently the progeny of the swollen and 

 proliferating epithelium. This change may affect the lobular 

 bronchi also. Sometimes the catarrhal proliferation is associated 

 with a peculiar transformation of the alveolar epithelium, that 

 having become distinctly columnar in character. The fact that 

 catarrhal changes are common in contagious pleuro-pneumonia 

 has been strongly insisted on by several writers upon tlie subject, 

 notably by Dr. Gerald Yeo and Dr. Woodhead." — {Veterinary 

 Periodicals?) 



With regard to the conclusions of Yeo, I have already demon- 

 strated their fallacy ; and with reference to those of Woodhead, 

 published in the Journal of Comparative Pathology, &c., 1888, 

 I wish to draw attention to a review of that article by M. Dela- 

 forge, sanitary veterinary surgeon for the Department of the 

 Seine — Becueil de Med. Veterinairc for 15th May 1889, page 324. 

 He says : — " In an analysis of ' Studies on the Pathological 

 Anatomy of Pleuro-Pneumonia,' by Sims Woodhead, which 

 appeared in the Becueil for 15th March, I read as follows : ' The 

 pathological process consists in an irritation of the mucous mem- 

 brane of the smaller bronchi, followed by shedding of the epi- 



