_3dly._ In 1854 appeared a Report of the Researches on Pleuro-Pneumonia, by a scientific commission, instituted by the Minister of Agriculture in France. This very able pamphlet was edited by Prof. Bouley, of Alfort, France. The members of the commission belonged to the most eminent veterinarians and agriculturists in France. Magendie was President; Regnal, Secretary; besides Rayer, the renowned comparative pathologist; Yvart, the Inspector-General of the Imperial Veterinary Schools; Renault, Inspector of the Imperial Veterinary Schools; Delafond, Director of Alfort College; Bouley, Lassaigne, Baudemont, Doyere, Manny de Morny, and a few others representing the public. If such a commission were occasionally appointed in this country for similar purposes, how much light would be thrown on subjects of paramount importance to the agricultural community! Conclusions arrived at by the commission are too important to be overlooked in this connection. The reader must peruse the Report itself, if he needs to satisfy himself as to the care taken in conducting the investigations: but the foregoing names sufficiently attest the indisputable nature of the facts alluded to. In instituting its experiments, the commission had in view the solving of the following questions:-- _1stly._ Is the epizooetic pleuro-pneumonia of cattle susceptible of being transmitted from diseased to healthy animals by cohabitation? _2dly._ In the event of such contagion's existing, would all the animals become affected, or what proportion would resist the disease? _3dly._ Amongst the animals attacked by the disease, how many recover, and under what circumstances? How many succumb? _4thly._ Are there any animals of the ox species decidedly free from any susceptibility of being affected from the contagion of pleuro-pneumonia? _5thly._ Do the animals, which have been once affected by a mild form of the disease, enjoy immunity from subsequent attacks? _6thly._ Do the animals, which have once been affected by the disease in its active form, enjoy such immunity? To determine these questions, the commission submitted at different times to the influence of cohabitation with diseased animals forty-six perfectly healthy ones, chosen from districts in which they had never been exposed to a similar influence. Of these forty-six animals, twenty were experimented on at Pomeraye, two at Charentonneau, thirteen at Alfort, and eleven, in the fourth experiment, at Charentonneau.