The Bulletin 
33 
come affected with trembles earlier than those in lactation. Here again, 
six animals whose lambs had been weaned were selected. The data 
bearing on this experiment are presented in the following tabulation: 
TABLE V— Results of Feeding White Snakeroot to Ewes with Weaned Lambs. 
Experiment 8. 
Feed given. 
Ewe No. 
Initial weight. 
Experiment 
Date of 
Days before 
Grain. 
Weed. 
Kale. 
Hay. 
Lbs. 
begun. 
death. 
death occurred. 
Lbs. 
Lbs. 
Lbs. 
| Lbs. 
25 
104 
July 7 
Sept. 2 
56 
79 
27 
24 
55 
158 
108 
July 7 
Sept. 2* 
56 
81 
27 
24 
55 
149 
98 
July 7 
Sept. 2* 
56 
81 
21 
24 
55 
163 
102 
July 7 
Sept. 2* 
56 
73 
27 
24 
55 
173 
105 
July 7 
Aug. 24 
48 
68 
23 
24 
47 
172 
85 
July 7 
Sept. 7* 
56 
81 
28 
24 
55 
*The feeding of white snakeroot was discontinued at this date. 
It may be noted above that ewe 173 died after having been on the 
experiment 48 days, and ewe 25 after 56 days. Both had typical cases 
of trembles, whereas the others remained apparently healthy when the 
feeding with white snakeroot was discontinued, September 2. Since 
the period of lactation of the ewes in Experiment 7 was so far advanced 
and since so few deaths occurred in both experiments 7 and 8, no con¬ 
clusion can he drawn as to«the influence of lactation upon the period 
of resistance. 
Experiment 9 .—Four lambs and one sheep were used in this experi¬ 
ment to test the toxicity of expressed sap. Lamb 237 was given 500 c.c. 
in the afternoon of July 30. On the morning of the following day it 
was given 500 c.c. and an equal quantity in the afternoon. This animal 
had been given 1500 c.c. and was found dead on the morning of Au¬ 
gust 1. 
Lamb 241 was given 250 c.c. on July 30 and two quantities of 250 c.c. 
on July 31. She refused to eat oats on the morning of August 1, and 
was given no more plant juice until the evening of August 3, when she 
again appeared normal. At this time, she was given 250 c.c. On each 
of the two succeeding days she was given 500 c.c., making a total of 
2,000 c.c. She refused to eat on the morning of August 6 and trembled 
when made to rise. Feeding with juice was therefore discontinued, 
and she died on August 9. 
Lamb 231 was given daily three feedings of juice of 250 c.c. each be¬ 
ginning on the evening of August 6. Only 250 c.c. were given on August 
10 and 500 c.c. on August 11. This lamb had received 4500 c.c. by the 
evening of August 13, when symptoms of trembles were manifest. 
Trembling was violent on the following morning and the animal died 
during the afternoon. 
