COMPARATIVE PATHOLOGY REPORT 
By J. F. RYDER 
During the past year special efforts have been made to increase the number of Animal 
Pathological specimens in the museum, and to make this department of Comparative Pathology 
more complete ; to add specimens showing the close relationship existing between the diseases 
of man and those of the lower animals ; and to make the collection not only one of scientific 
interest but of practical value to students of research, D. P. H. students, and meat inspectors. 
The museum now contains about lOO specimens, and new specimens are being received 
and mounted almost daily. In many cases the specimens are of great value in illustrating 
pathological conditions in different animals. In the majority of specimens sections have been 
cut and mounted for microscopical examination and can be seen at any time. 
We may note among the specimens such interesting ones as — 
No. 44. Actinomycosis of tongue. Bovine. 
No. 49. CEosophagostoma columbianum, or nodular disease of intestines in sheep. 
No. 52. Tubercular mammary gland from cow. Animal giving milk. 
No. 64. Tubercular lungs, liver, and intestines from a fowl. Avian tuberculosis. 
No. 66. Tubercular lungs and liver from a goat. Very rare. 
No. 67. Tubercular lungs from calf two weeks old. 
No. 69. Carcinoma of mamma, bitch. Secondary growths in liver, spleen, lungs, and 
on pleura. 
No. 74. Tubercular spleen. Bovine. 
No. 80. Liver from pig, showing numerous gall-stones from size of pea to hen's egg. 
No. 16. Nasal septum from horse. Glanders showing ulcers. 
A descriptive catalogue of the museum will be ready very siiortly. 
