INFLUENCE OF CLIMATE, ETC., ON 
THE DISTRIBUTION 
& CHARACTER OF DISEASE. 
545 
ventilation a minor one, and being in a highly productive and 
prosperous agricultural region most horses are well fed and 
receive careful handling. The unfavorable climatic conditions 
aie counterbalanced largely by favorable surroundings in other 
respects. In this series of states we find every possible type of 
glanders, the chronic prevailing, although the acute is not un¬ 
common, due evidently to overcrowded, unsanitary stables. In 
country districts, quite notably in central Illinois, many cases 
exhibit a very mild type with very distinct tendency to spon¬ 
taneous recovery. 
Animals, which from,, their history have evidently been 
affected for six or eight years, have at no time been inca¬ 
pacitated in the least for ordinary work but have in every way 
except occasional cough and slight nasal discharge with slight 
tumerfaction of sub-maxillary lymphatics and characteristic 
ulcerations, or cicatrices giving all evidence of robust health. 
Others have come under our observation, where an entire stable 
of horses had become affected alike apparently in an acute form, 
with emaciation and profuse nasal discharge, some of which en¬ 
tirely recovered ; others partially recovered, and after two or 
three years were condemned and killed, while the recovered 
animals exhibited no signs of disease, although exposed to ani¬ 
mals plainly affected. Acute cases, apparently approaching 
rapidly a fatal termination, frequently turn under favorable con¬ 
ditions and make very marked improvements. 
The laws for killing prevent opportunities for very extended 
observations. 
In New York, Dr. Law, Ithaca, observed to me in a private 
conversation, that the had seen at Ithaca permanent recovery 
from the disease. 
Wisconsin, Michigan, and Minnesota, probably differ but lit¬ 
tle from the series of states just considered. Dr. J. S. Butler, 
Minneapolis, noted that in his experience, the disease is more 
prevalent and more acute in large cities, where horses are 
crowded in ill-ventilated stables. He also remarks that in his 
locality the disease apparently remains latent in winter and de- 
