PREVENTION OF PLEURO-PNEUMONIA. 177 



tice may in process of time be encouraged by the addition of 

 farther knowledge on the subject. — " Kapport General des Tra- 

 vaux de la Commission Scientifique institues pres le Ministere 

 de I'Agriculture, du Commerce et des Travaux Publics pour 

 I'etude de la Peripneumonie Epizootique du Gros Betail." 



" Gerlach says, — ' The lung disease always yields to police 

 regulations ; whole districts, as well as individual farms, where 

 the disease had existed for several years, have been invariably 

 freed within a twelvemonth on the prescribed measures being 

 rigidly carried out. Inoculation can be tried as a preservative 

 in districts where the disease is very prevalent. The results are 

 reported to have been as follows : — Out of 6864 head on which 

 it had been tried, it succeeded in 5434 cases, and had no effect 

 on 1430 cases; 113 head died in consequence of the operation, 

 and 118 head of the lung disease ; in this country it has not 

 been tried, and the data we at present possess are insufticient to 

 lead to any definite conclusion.' " * 



In the same year, M. Marret, V.S., Allanche, published the 

 result of his experiments on cattle in the department of Murat. 

 The memoir is too long for insertion here, but we give his con- 

 clusions in an abbreviated form, and refer the reader for details 

 to a translation of the article which appeared in the " Veterin- 

 arian " for October 1854, p. 578 : — " These several amounts 

 constitute a total of 855 animals, belonging to different land- 

 holders, on whose farms the epizootic had made more or less 

 considerable ravages. The success of inoculation proved in 

 every case complete, save some trifling accidents happening at a 

 time when inoculation was far advanced. In the face of similar 

 facts equally varied and numerous, of which the greater part 

 are established by a considerable lapse of time, can any doubt 

 remain of the preservative property of pleuro-pneumonic virus ? 

 I do not think it. This question appears to me finally set 

 at rest." 



The proposition of Dr Willems, recommending inoculation 

 as a safe preservative against pleuro-pneumonia, was warmly 

 encouraged by Didot, Ercolani, Corvini, and others ; but decided 

 opposition was subsequently developed, and vigorously pro- 

 secuted, by some of the most eminent men of the day. 



We now come to the report of the Commissioners appointed by 

 the Legislative Assembly of New South Wales which appeared 

 in 1864. The appearance of pleuro-])neumonia in the colony in 

 1862 spread great alarm abroad, probably intensified by the 

 knowledge that in the neighbouring colonies all the means for 

 its extermination had failed, and the sums voted by the Legis- 

 lative Assembly were completely exhausted, while the disease 



* Report of Murrain in Horned Cattle, by E. Headlaiii Greenhow, M n, ]857. 

 P. 67. 



