EXPERIMENTS WITH TUBERCULIN ON NONTUBERCULOUS COWS. I3I 
is only a little more than that of the untreated cow Freda (0.6), 
and only about half that of Molly (1.5) ; the Jersey Daisy also 
made her highest per centage (5.6) October 20th, and her lowest 
(4.9) December 8th, when under the action of tuberculin. But 
she made her second highest (5-55) November 10th, when under 
tuberculin, and an equal record November 17th, two days after 
the operation of a dose of tuberculin. Her greatest variation 
was 0.7%, while that of the untreated cow Bertha was 1.15%. 
There is therefore no change in the percentage of butter-fat 
sufficient to indicate any disease or ill-health as the result of the 
administration of repeated test doses of tuberculin. 
EFFECT ON BODY WEIGHT. 
The weight of the animals varied so little during the experi¬ 
ment that it might be said to have remained stationary. The 
record is as follows : 
Oct. 30th, 
Dec. 1st, 
Dec. 13th, 1894, 
Jan.5th, 1894. 
Belva, 
1264 lbs. 
1300 lbs. 
1404 lbs. 
Mabel, 
1455 “ 
1540 “ 
LO 
O 
W 
Daisy, 
945 *' 
950 “ 
965 “ 
Grade Shorthorn, 
1020 “ 
1020 lbs. 
1026 “ 
Grade Devon, 
895 “ 
915 “ 
910 “ 
Considering that a variation of 50 lbs. in the weight of a cow 
may occur in a few hours according as it is taken before or after 
feeding and watering or milking, there may be said to have been 
no change excepting in the case of the two Holstein’s, in which 
there is shown a gain of 141 lbs. and 115 respectively. It is 
worthy of notice that the last weighing, which makes the highest 
record was made three to four hours after the morning feeding, 
and (in the case of the three first cows) of the morning milking. 
The two dry cows had been watered but had not been fed on the 
morning of the last weighing as they were just about to be 
killed. 
It may be concluded that the repeated test doses of tuber¬ 
culin had in no injurious way affected assimilation, and that in 
