The next case was a cow belonging to Mr. G. H. Roach, of the same place, which had been grazing in a lot adjoining that of Mr. Parrish. This cow was killed in the presence of Charles Wood, V.S., of Boston, Mass., and Arthur S. Copeman, of Utica, N. Y., who was one of a committee appointed by the New York State Agricultural Society for the purpose of investigating the disease. Both of these gentlemen having witnessed the disease in-all its forms, as it appeared in Massachusetts, were the first to identify this case with those in that State. Upon opening the cow, the left lung was found to be completely consolidated, and adhered to the left side, presenting the appearance usual in such cases. As she was with calf, the lungs of the foetus were examined, disclosing a beautiful state of red hepatization. The author's attention was next called to the herd of Mr. Lippincott, a farmer in the neighborhood, who had lost several cattle by the disease; but as he had been persuaded that treatment was useless, he abandoned the idea of attempting to save his stock in that way. From Riverton it soon spread to Burlington, some ten miles farther up the river, where it carried off large numbers of valuable cattle, and it continued in existence in that neighborhood for some time. The disease was not then confined to these localities alone, but has spread over a large extent of country,--and that, too, prior to its appearance in Massachusetts, as will be shown by extracts from the following letters, published in the _Country Gentleman_:-- "We have a disease among the cattle here, I will class it under these names,--congestion of the lungs, terminating with consumption, or dropsy of the chest. Now, I have treated two cases; one five years since, as congestion,--and the first is still able to eat her allowance, and give a couple of pails of milk a day,--and the other, quite recently. The great terror of this disease is, that it is not taken in its first stages, which are the same in the cow as in the man--a difficulty in breathing, which, if not speedily relieved, terminates in consumption or dropsy. I have no doubt that consumption is contagious; but is that a reason why every one taken with congestion should be killed to check the spread of consumption? So I should reason, if I had pleuro-pneumonia in my drove of cattle. J. BALDWIN. "NEWARK, N. J., June 11, 1860." "I notice that a good deal of alarm is felt in different parts of the country about what is called the cattle-disease. "From the diagnosis given in the papers, I have no doubt this is pleuro-pneumonia, with which I had some acquaintance a few years ago. If it is the same, my observation and experience may be of some service to those suffering now.