RELATION OF BOVINE TO HUMAN TUBERCULOSIS. 7 
be submitted which, while circumstantial, are sufficient to 
lead us beyond the range of probability, to the very verge 
of absolute certainty. Our certain knowledge on the follow¬ 
ing may be analyzed as follows: 
TRANSMISSION OF TUBERCULOSIS FROM ONE ANIMAL 
TO ANOTHER NOT INCLUDING MAN. 
ist , by Meat. —Experiments, by their positive results, 
demonstrate that tuberculosis is transmitted in this way, 
both by artificial inoculation with the muscle juice of tuber¬ 
culous animals, as well as by feeding the diseased tissue. 
2d, by Milk .—This has been as fully demonstrated by a 
long series of experiments consisting of the inoculating of 
different animals with tuberculous milk, both from cows 
with diseased udders as well as those not so diseased, and 
further by the feeding of calves, rabbits, pigs, etc., with milk 
from tuberculous cows. 
TRANSMISSION TO MAN. 
• 
There is, as previously stated, for reasons well under¬ 
stood, no opportunity to secure evidence by artificial methods. 
By natural methods the evidence consists of recorded obser¬ 
vations, which have been made by close observers, covering 
a period of many years, of people who have used the milk 
and meat of tuberculous cattle. Dr. John Repp has gath¬ 
ered some statistics bearing on this point which are most 
interesting, as follows: “Oliver reports that in a young 
ladies boarding school, five girls, the children of healthy 
parents, died of tuberculosis of the intestines. The cow 
which had for many years supplied the school with milk 
was found to have generalized tuberculosis including the 
udder. 
“ Two daughters of a Scotch family of good health, who 
were brought up on milk of tuberculosis cows, died of 
tuberculosis. Two sons in the same family, wno did not 
use the milk remained healthy.” “Stang reports the case of 
a five-year-old boy of sound parentage and ancestry, who 
died of tuberculosis. The cow whose milk this boy used 
was found badly tuberculous.” “Demme reports the case 
of four infants in the Children’s Hospital at Berne, the off¬ 
spring of sound parents, that died of intestinal and mesen¬ 
teric tuberculosis. He was able to exclude all other sources 
of infection and to decide that they had been infected by 
