22 
Report of the Laboratory for the Year Ending 
February 29th, 1912. 
The past year has been one of great activity for the 
laboratory. The mortahty has been rather high, in part 
undoubtedly due to some tests we have made on small 
birds and to our attempts at cleaning out infected monkeys. 
There have been very few groups of cases upon which 
special comment can be made, aside from those included in 
the satisfactory work of Dr. Weidman upon parasites and 
our tuberculin tests. I shall, however, refer briefly to some 
conditions to which the laboratory's attention has been 
directed during this and previous years. At first is given a 
classified list, according to zoological orders, of the patho- 
logical diagnoses made at autopsy or by subsequent micro- 
scopical examination. The diagnoses, not always the causes 
of death, are listed in full as a matter of scientific record. 
Total animals examined, 367. 
Total mammalia examined, 105. 
Primates. Number examined, 29. 
Diseases of the gastro-intestinal tract: 
Acute gastric dilatation, 1 ; enteritis, 8; gastritis, 2; gastric fermenta- 
tion, 2. 
Diseases of the circulatory system: 
Brown atrophy of heart muscle, 1; cloudy swelling of myocardium, 
2; myocarditis, 1; sub-peri and endocardial hemorrhages, 1. 
Diseases of the liver: 
Congestion, 1; cloudy swelling, 2; fatty change, 4; hepatitis, 1. 
Diseases of the genito-urinary system: 
Amyloid of kidney, 1; congestion of kidney, 2; cloudy swelling of 
kidney, 2 ; hemorrhage into adrenal, 1 ; hypertrophy of adrenal, 
1; congestion of adrenal, 1; chronic adrenalitis, 1; acute ne- 
phritis, 4; chronic nephritis, 2. 
Diseases of the respirator^ system: 
Broncho pneumonia, 2; congestion of lung, 1; emphysema, 1; hemo- 
rrhage into lung, 1 ; insular pneumonia, 1 ; petechial hemorrhages 
in lung, 1. 
Diseases of the lymphatic system: 
Amyloid of spleen, 3; abscess of spleen, 1; chronic splenitis, 2; 
encysted parasites in spleen, 1 ; infarct of spleen, 1 ; lymphadenitis, 
4; splenitis, 5. 
