130 
M. A. CHAUVEAU. 
oozing from the divided surface, and numerous miliary tubercu¬ 
lous deposits are found in the whole pulmonary structure. The 
mucous membrane of the bronchi! is congested, of a livid color, 
and their cavity is filled with frothy mucus. 
The heart weighs about fifteen pounds. Its external appear¬ 
ance is healthy. The two venticles are empty. There is a cer¬ 
tain atrophy of the walls, and small calcareous deposits on the 
tricuspid and semi-luner valves. The pericardium is adherent to 
the pleura and to the lungs by strong fibrous valves. The peri¬ 
cardiac and cardiac lymphatic glands are greatly enlarged and 
indurated, and slightly nodular on the surface. Three large 
tubercles are attached to the superior face of the sternum. The 
axillary lymphatic glands of both sides are very much enlarged, 
as are the pectoral, propectoral and lymphatic glands of the neck. 
Microscopical examination of some of the glands, made by 
Dr. Peabody, pathologist at the New York Hospital, is reported 
as follows: 
“ I have just examined sections from the lymphatic glands, 
liver and skin of your patient, the female rhinoceros. I have 
never seen more typical or more beautiful illustrations of tuber¬ 
culosis than the two former present. There are relatively few 
areas of caseous degeneration in my sections. I have never seen 
more perfect giant cells than these sections show, nor have 1 
ever found them so numerous in any'human tubercle. The skin 
is normal, so far as I have cut it. 
“ Yery truly yours, 
“ New York, April 14, 1883.” “ G. L. Peabody. 
EXPERIMENTAL PHYSIOLOGY. 
DIRECT AND RAPID ATTENUATION OF VIRULENT CULTURES 
BY THE ACTION OF HEAT. 
By M. A. CnAtrvEAU. 
The .present subject has perhaps a great practical importance 
I will explain further on. For the present it treats principally 
of the general physiology of viruses, in the study of which I have 
