DISEASED MEAT AS FOOD FOR HUMAN CONSUMPTION. 
129 
young children whose parents are by no means tubercular, 
and who have no hereditary taint. In some of these cases, 
where no hereditary taint exists and no evidence of trans¬ 
mission from a human source, have we not a very possible 
source, viz., infection through milk from tubercular cows. 
Considering the number of cases of tubercular animals 
among dairy cows and the experimental proof that tubercles 
in the milk glands void bacilli in the milk, a large amount of 
this milk must necessarily find its way into households for 
human food ; hence we have a very possible source for the 
number of tubercular cases in children, they being the chief 
consumers. 
In many cases of tuberculosis in cattle we not only 
have the lungs affected, but also the liver, spleen and 
lymphatic glands, and even the marrow of bones has been 
shown to be affected ; and do not all these facts conclusively 
prove that the tubercular virus is distributed through the 
body by the vascular system. No other means than the blood 
can distribute it to such distant localities, otherwise so inde¬ 
pendent of each other, as the lungs, external lymph glands 
and the marrow of bones. 
This conclusion at once disposes of the assumption occa¬ 
sionally made that if in an animal the lungs and the thoracic 
glands are the only organs visibly affected, the removal of 
these parts is sufficient to insure the safety of the rest of the 
body as far as its usefulness for human consumption is con¬ 
cerned. 
We may not be able to discover by the naked eye, nor 
the use of the microscope, the presence of bacilli in the con¬ 
nective tissue or muscle. Yet, are not all these parts supplied 
with blood, and at the time of killing may not the virus be 
coursing through the vascular system on its way to more 
distant localities, such as the marrow of bones destined in the 
natural course of things to become the seat of tubercular 
deposits? Thus it must seem clear that no part of an animal 
in which even a single organ is affected with tubercle can be 
held clear from the virus. 
I do not think that any one who has the welfare of his 
