tio ABSTRACTS AND REPORTS.

. This melanosis of the lung :lnd of the other viscera _ of the calf appears during the first moments of extra-uterine life; it is destined to disappear in the adult animal, and it is not accompanied by the formation of neoplasms, such as carcinomata or sarcomata, like those met with in man and in grey hqrses.

It is concluded that the presence of such melanotic foci in the organs of the calf in no way renders these unsafe for human consumption.-Rez'Zte Vderinaire.

A DISEASE OF NEW-BORN CALVES.

IN the course of last winter a disease broke out among the new-born calves in the neighbourhood of Pavia and was the cause of heavy losses. The veterinary surgeons were not agreed regarding its nature; some of them con­sidered it a special form of enteritis and diagnosed it as the diarrhcea of calves (white scour), whi~e others regarded it as a form of nephritis. Monti and Veratti made investigations regarding the disease in the pathological laboratory of the University of Pavia, and were able to verify the existence of al;)Uminuria and diarrhcea, which, however, they found to be merely the local manifestation of a general infection. Their researches led them to the following conclusions.

First. - The disease of newly born calves is a general infection which has its starting-point in the digestive tube.

Second. -This infection, which is characterised by diarrhcea and albuminuria, determines grave alterations in the intestine, the lymphatic glands, the kidneys, and the brain, and, secondarily, congestion and small hremorrhages in a great number of other organs.

Tlu"rd.-The specific agent of this infection is a bacillus related to the baderiu/Il (Oit" comlllUlze; it passes from the intestine into the circulatory apparat'ls, and leads to the development of numerous colonies in all the organs.-Rt'z'lte Veterinat"re.

RESEARCHES REGARDING AVIAN TUBERCULOSIS.

MM. CADIOT, Gilbert, and Rogers, as the outcome of their researches, conclude that the bacillus which is the cause of tuberculosis of fowls and that which causes the disease in mammals are two varieties or races of the same species, and they consider it possible that the one may be tral15formed. into the other. These conclusions are based on eighty-five experiments. The tuberculosis of fowls is easily inoculated to the r.lbbit, but with more difficulty to the guinea-pig. However, after several passages in mammals it may become \'ery active for the guinea-pig, and, as with the human virus, set up the development of visceral granulations; at the same time it may lose Its pathogenic powers for the fowl. In order to observe such modifica­tions in the virulence of the bacillus of avian tuberculosis it is necessary to carryon experiments for sc:nne years, and to remember that tuberculosis of the fowl is not caused by a fixed or uniform virus, but by one whIch varies n ::>tably in virulence from bird to bIrd.

In less than a year these same authors have been able to collect fifty-seven cases of tuberculosis in palTakeets, and they find that in this species the disease assumes such special characters :IS to make it impossible to determine the real nature of the malady except by the discovery of the bacillus. In general the disease is manife.,ted by cutaneous lesions which are comparable to some