12 THE PORTRAIT GALLERY 
at the time of his death he was endeavoring to find an immuniz- 
ing agent against this disease. So eminent had he become in 
state veterinary work that in 1895 SecreTary Morton offered 
him the position of Chief of the Bureau of Animal Industry. 
His interest in veterinary education and his loyalty to Pennsyl- 
vania led him to decline the offer. He was a prominent writer 
on veterinary subjects. For years he conducted the veterinary 
magazine through which he gave to his profession much of the 
best in the languages of other countries, as well as many valuable 
contributions of his own. In 1908 the University of Pennsyl- 
vania conferred on him the honorary degree of Doctor of Medi- 
cine. 
Dr. PEARSON was a member of the Seventh International 
Congress of Hygiene and Dermography held in London in 1891, 
and of the Third International Congress for the Study of Tuber- 
culosis held in Paris in 1898. He was Secretary and President 
of the American Veterinary Medical Association, for two years 
was president of the Pennsylvania State Veterinary Medical 
Association, and for a similar period headed the Keystone Vet- 
erinary Medical Society. Dr. PEARSON was an active member of 
the Guernsey Cattle Club at Philadelphia, of the Pennsylvania 
Livestock Breeders’ Association and of the State Grange. While 
not a cattle showman, Dr. Pearson did a great deal toward in- 
teresting men of wealth and discrimination in the cause of the 
Guernsey, and was an instrumental factor in their dissemination 
throughout the state. Professionally, Dr. Pearson held mem- 
berships in the American Public Health Association, the City 
Board of Health in Philadelphia, the State Board of Health, and 
was Veterinarian to the State Board of Agriculture. 
