MILK AS A FACTOR IN THE CAUSATION OF DISEASE. 
Ill 
He shows that among 
23,557 calves slaughtered there were 2 cases of. tuberculosis. 
3°>477 
143,218 
23.592 
800,000 
24,766 
1,153.695 
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35 
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“ 231 “ .006% 
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“The only explanation of these figures,” says Dr. Watson, 
“ is that there are few bacilli in the milk of most tuberculous 
cows.” 
Taking everything into consideration, then, the only conclu¬ 
sion we can come to, is that practically and under natural con¬ 
ditions the greatest danger from the general use of cows’ milk, 
especially by infants, is the part it plays in the aetiology of 
cholera infantum. 
In the mortality report of the Mass. Board of Health for 
1892, it is shown that there were, 
5739 deaths from phthisis at all ages, 
2898 u “ cholera infantum, 
1455 u “ diphtheria and croup, 
827 “ “ typhoid fever, 
669 “ u scarlet fever, 
80 “ u measles. 
In this report we see cholera infantum placed next to phthisis 
in the death rate. Now, in considering this subject it must be 
remembered that the latest statistics show that by far the largest 
proportion of cases of phthisis occur in people who have recently 
moved into houses previously occupied by consumptives. While, 
on the other hand, cholera infantum is due almost solely to the 
ingestion of pure milk. Further, the deaths from phthisis 
include deaths at all ages, while cholera infantum occurs only 
in children under five years, and practically under one year old. 
In New Hampshire the proportion of deaths from cholera 
