600 
G. A. JOHNSON. 
sanitaria for consumption. But to-day we find the white man 
in possession, and cattle raising one of the principal industries 
of this comparatively thinly settled country. And tubercu¬ 
losis is quite prevalent among the people ; while it is estimated 
that i ^2 to 3 per cent, of the cattle (and we know that as high 
as 75 per cent, of some herds) are tubercular. Thus we find 
that as the country settles up, and cattle raising takes the place 
of the chase, nature’s sanitarium moves to the west. 
China .—In China we find a peculiar condition relative to 
tuberculosis. The wealthier, or ruling classes, who live in the 
best homes and are surrounded with the best sanitary condi¬ 
tions of the country, having plenty to subsist upon, and using 
more or less of the food products of the cow, are frequently 
afflicted with tuberculosis, while the poorer classes, who can 
scarcely eke out an existence, and live in crowded quarters and 
under conditions that are anything but good from a sanitary 
standpoint, subsisting almost wholly upon a vegetable diet, 
probably never tasting meat other than rat soup, are free from 
tuberculosis. 
India. —A somewhat similar condition prevails in India. 
Owing to religious beliefs these people are largely vegetarians. 
Other and similar instances could be cited, but I trust that 
sufficient has been presented to substantiate the statement that 
among every people who use the food products of the domestic 
cow, tuberculosis is more or less prevalent; while it is rarely, 
if ever, seen among those peoples who do not use such foods. 
Comparison of the Disease .—In the main, the morbid lesions 
are very similar, if not identical, in man and cattle. Yet a 
brief comparison of the disease as seen in the two species re¬ 
veals, among others, these apparent differences, which may in 
reality be differences of degree rather than of kind. 
First .—The disease runs a more insidious course in cattle 
than in man. 
Second .— The formation and escape of tubercular pus is 
much more limited in cattle than in man. This is probably 
due to the marked tendency in cattle toward a limitation of 
