630 
JOHN J. REPP. 
Schroeder 23 inoculated 40 guinea-pigs with the sediment 
resulting from centrifugalizing 19 samples of dairy and dealers’ 
milk. Four died of intercurrent disease, and out of the 36 re¬ 
maining 1 developed tuberculosis, 0.28 per cent. Nothing is 
known of the cows from which the milk was obtained. I11 
another series 32 guinea-pigs were inoculated intraperitoneally 
with centrifugalized milk of 15 cows either known to be tuber¬ 
culous or which gave a tuberculin reaction. Of these 1 devel¬ 
oped tuberculosis, 0.3 per cent. In still another series the cen¬ 
trifugalized or untreated milk of 4 cows whose udders were not 
diseased was injected into 16 guinea-pigs, each receiving intra¬ 
peritoneally 5 doses on as many different dates. None of them 
developed tuberculosis. 
Bollinger 24 produced tuberculosis in experimental animals 
with the milk of a cow with non-tuberculous udder. 
May 25 injected the milk of 6 cows, 1 of which had a tuber¬ 
culous udder, and found the milk of the tuberculous udder in¬ 
fectious. 
Stein 26 obtained by the same method 4 positive results out 
of 14 injections with milk from sound udders, 28.57 per cent. 
Nocard 27 inoculated the milk of 54 cows and obtained in¬ 
fection with 3 which had diseased udders. 
Kanthack and Sladen, 28 in examining 16 sources of the 
milk supply to the colleges in Cambridge, England, inoculated 
90 guinea-pigs with the result that 23, or 25.55 per cent., died 
of tuberculosis. Of these 23, 13 were inoculated from the 
creamy layer and 10 from the sediment. Of the 16 dairies ex¬ 
amined 9 were infectious, 56.25 per cent. 
The Director of the Jenner Institute of Preventive Medi¬ 
cine 29 found by animal inoculation that the milk of 17 out of 
100 samples was able to produce tuberculosis, 17 per cent. 
Adami 30 reports that he and Martin, in inoculating the 
milk from 10 tuberculous cows whose udders were free from 
tuberculosis, produced tuberculosis in 2 guinea-pigs out of 29 
guinea-pigs and 26 rabbits inoculated intraperitoneally, 3.6 per 
cent. A calf fed 5 months with the milk of the cow that pro- 
