SOCIETY MEETINGS. 
375 
perfectly healthy lungs of weak, decrepit and cachetic animals from general de¬ 
pressing influences, and is developed from a circumscribed passive stasis. Under 
similar circumstances we find it associated with pneumonia in its various stages, 
with pulmonary abscesses, with tuberculosis, with bronchitis, or it may be caused 
by the absorption of gangrenous ichor from gangrene of different parts into the 
blood. 
Heart .—There is nothing at variance with the possibility of the occurrence of 
gangrene in the muscular substance of the heart. Ulcerations accompanied with 
malignant products are not of rare occurrence, but the correctness of the observa¬ 
tions purporting to refer to gangrene of the heart have nevertheless been called 
in question by several writers ; and we must remark that no case of the kind ever 
came under our notice. 
Uterus .—We sometimes find gangrene of the uterus resulting from inversion, 
causing a gradual compression of the veins, the vessels become engorged with 
blood admitted to them faster than it can leave them, and so after intense conges¬ 
tion mortification ensues. 
Penis .—We also meet with gangrene of the penis resulting from paraphimosis 
or strangulation of the glans penis. 
Tongue .—The point of this organ is in rare cases found in a gangrenous con¬ 
dition caused generally by the administration of some caustic irritant, such as 
turpentine, potash, etc.; also by the pressure of the halter rope in leading, when 
it passed through the mouth enclosing the tongue. 
When mortification has a tendency to spread, its dark color is gradually lost 
in the surrounding tissue. Whereas, when if ceases to spread, a red line, called 
the line of demarcation, separates the dead from the living tissue. This line is 
always regarded as most important, indicating that sloughing has ceased to spread, 
and that a process has begun for the removal of the sphacelated mass from the 
system. The final act in the separation of dead tissue is that of ulceration of por¬ 
tions of living tissue, which are in immediate contact with the dead. A groove 
is formed by this ulceration which circumscribes and entrenches the dead part, 
and then gradually deepening and converging, undermines it until it reaches the 
centre, when the separation is complete and the slough falls off or is dislodged. 
By the discharge of the ulcerated living tissue concomitant with this process 
of destruction one of repair is set up. As the ulcerated groove deepens, so do 
granulation cells rise from its surface, so that one might say that which yesterday 
was ulcerating is granulating to-day, and thus very soon after the slough has sep¬ 
arated the whole surface of the living part from which it was detached is covered 
with granulation and proceeds like an ordinary ulcer towards healing. 
ORGANIZATION OF THE BUREAU OF ANIMAL INDUSTRY. 
A note received from Dr. E. Salmon, Chief Veterinarian of 
the Bureau of Animal Industry, indicates the following gentle¬ 
men who are acting as members of the Bureau: Drs. W. B. E. 
Miller, D.V.S., C. B. Michener, D.V.S., T. J. Hoor, D.V.S., H. 
