RELATION OF BOVINE TO HUMAN TUBERCULOSIS. 13 
climates like Colorado are beneficial in staying the progress 
of the disease, yet it prevails in various sections from the 
torrid to the frigid zones. 
Altitude —Altitude has nothing to do with the distribu¬ 
tion of the disease, for we find it from the sea coast to the 
regions of the highest mountains. Dr. Johnson says that 
“certain peoples inhabiting the Dead Sea basin, which is 
between ioo and 200 feet below the sea level, are free from 
tuberculosis, whereas it is more or less prevalent among 
most people inhabiting the mountainous regions of Europe 
and America.” 
Civilization —The disease does not follow in the wake of 
civilization, for some of the savages and semi-civilized races 
are seriously afflicted. 
Density oj Pop 7 iation —As previously indicated, China 
and India, two of the most densely populated countries, are 
comparatively free, from tuberculosis, and in many of the 
rural districts of Europe and America the disease prevails. 
Filth and Poor Sa 7 iitatio 7 i —This has nothing to do with 
the distribution of the disease for we find it all the way 
from the wigwam to the palace. The fact remains that all 
these various conditions simply hasten to retard the morbid 
process, and not one of them can be said to be a constant 
factor in the distribution of the disease. The old argument 
of heredity has long ago fallen to the ground and been 
trampled to the dust, for new cases of consumption are 
constantly coming to view, where there cannot be traced 
any hereditary taint. 
The only constant factor seems to be the milk and 
meat of the bovine species, and we certainly consider this 
argument worthy of serious consideration. 
