POISONOUS PROPERTIES OF THE WHORLED MILKWEED. 3 
The plant material used was collected in Yuma County, Colo. — a 
part of it in the town of Wray. The material was dried, but in the 
experimental work was estimated as green plant, 72 per cent being 
allowed for loss of weight in drying. 
The following table is a summarized account of the experiments. 
22 in number : 
Table 1. — Summary of feeding experiments with Asclepias pumila (air-dried 
plant fed with balling gun). 
Anim 
al. 
Designa- 
tion. 
Weight. 
Pounds. 
Sheep 532. . 
98 
Sheep 514. . 
135 
Sheep 539. . 
99 
Sheep 547. . 
89.5 
Sheep 546. . 
100 
Sheep 482. . 
122.5 
Sheep 486. . 
135 
Sheep 530. . 
95 
Sheep 536. . 
114 
Sheep 539. . 
104 
Sheep 552. . 
94.5 
Sheep 516. . 
81.5 
Sheep 547. . 
95.5 
Sheep 554. . 
104.5 
Sheep 546. . 
101.5 
Sheep 512. . 
124.5 
Sheep 520. . 
102 
Sheep 539. . 
105. 75 
Sheep 516. . 
80.75 
Sheep 542. . 
111.5 
Sheep 519. . 
85 
Sheep 547. . 
99 
Date of 
feeding. 
1919. 
July 23 
July 25 
July 26 
July 28 
July 29 
Aug. 1 
Aug. 5 
Aug. 8 
Aug. 11 
Aug. 15 
Aug. 18 
Aug. 24 
Aug. 29 
Sept. 2 
Sept. 6 
Sept. 11 
Sept. 15 
Sept. 17 
Sept. 19 
Sept. 23 
Sept. 25 
Sept. 27 
Weight 
of plant 
(esti- 
mated 
Part of plant 
used. 
as green 
Remedy 
plant) 
used. 
for 100 
pounds 
of 
animal. 
Pounds. 
Leaves and 
0.150 
None 
stems. 
....do 
.197 
do 
....do 
.295 
do 
....do 
.402 
do 
....do 
.787 
do 
....do 
.787 
do 
....do 
.827 
do 
....do 
.866 
do 
....do 
.866 
do 
....do 
.905 
do 
....do 
.984 
do 
....do 
.984 
do 
....do 
1.063 
E serin and 
pilocar- 
pin. 
....do 
1.181 
None 
....do 
1.339 
do 
....do 
1.496 
do 
....do 
1.693 
do 
....do 
.787 
do 
....do 
1.850 
do 
....do 
1.968 
do 
....do 
2.165 
do 
....do 
2.559 
do 
Not sick 
do 
do 
....do 
Symptoms... 
do 
Sick 
Symptoms. .. 
Somewhat sick 
Symptoms 
Sick 
....do 
....do 
.....do 
....do 
Svmptoms 
Sick 
Svmptoms 
Sick 
....do 
Died 
....do 
Place and date of 
plant collection. 
Wrav, Colo., Julv 5, 
1919. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Yuma County, Colo., 
Aug. 12, 1919. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
TYPICAL CASE OF SHEEP 547. 
Sheep 547 was a ewe which had been used for other experimental 
work earlier in the season, but was in good condition when on July 
28, 1919, she was selected for feeding with Asclepias pumila. At 
that time she weighed 84 pounds. At 3.10 p. m., 0.402 pound green 
weight of the plant per 100 pounds of animal was given by the ball- 
ing gun. This produced no effect. 
On August 29, at 6.04 p. m., the sheep was given, by the balling 
gun, 1.063 pounds of plant, green weight, per 100 pounds of animal. 
At this time she weighed 95.5 pounds. On August 30, at 7.25 a. m., 
the pulse was 112 and weak, the respiration 12, rather deep, with 
somewhat forcible expirations. She was humped up, with the head 
held high, and showed weakness in the hind legs. Later in the day 
