LARKSPUR. POISONING OF LIVE STOCK. 
57 
sheep 108, 11.7 pounds, and sheep 116, 15.6 pounds. Inasmuch as 
the toxic dose for cattle, as is shown later, is from 3 per cent and 
iipward of the animal's weight, the sheep ate, relatively to their 
weight, from 2 to 5 times as much as is necessary to poison cattle 
without harmful results. 
Table IX. — Summary of feeding experiments upon sheep with Delphinium 
menziesii, 1910. 
No. of 
animal. 
Weight 
of 
animal. 
Amount 
of plant 
fed. 
Date of 
feeding. 
Part of plant fed. 
Amount 
fed to 100 
pounds of 
animal 
weight. 
Location 
from 
which plant 
fed was 
obtained. 
125 
113 .. 
Pounds. 
100 
100 
100 
106 
90 
Pounds. 
111.75 
32.75 
50.25 
101 
73.75 
June 2-16 
June 2-13 
June 13-22 . . . 
June 15-26... 
do 
Leaves, stems, and flowers 
Pounds. 
111.75 
32.75 
50.25 
95.3 
81.9 
Pass Creek. 
113 
119 
123 
Leaves, stems, and flowers ■ 
Leaves, stems, flowers, and seed. 
Leaves, stems, and flowers 
Do. 
Pass Creek. 
Do. 
EXPERIMENTAL HERDING OF SHEEP UPON DELPHINIUM MENZIESII. 
Delphinium menziesii was particularly abundant in Pass Creek 
Park, near the Mount Carbon Station. When the plant was in blos- 
som the whole park seemed to be colored purple. Plate XY, figures 
1 and 2, show sheep feeding and give a good idea of the abundance 
of the plant in the park. It was thought desirable to try an experi- 
ment of close herding a bunch of sheep upon the larkspur. If Del- 
phinium menziesii would poison sheep upon the range, symptoms 
ought to be developed by such close herding, for if they ate freely 
it would be evident that a much larger quantity would be eaten than 
under any ordinary circumstances that would prevail in range feed- 
ing. Accordingly, on June 14, 19 sheep were taken from the station 
to Pass Creek Park and were kept until the afternoon of June 17. 
During the day they were herded upon the larkspur area, and cor- 
ralled at night in an old cabin. Most of them ate very freely of 
the Delphinium menziesii. Notes taken in regard to the individual 
sheep show that .five may be considered to have eaten only a little. 
All the rest, however, ate a considerable quantity. They were not 
allowed to stray from the larkspur patch, and the feeding while 
they were herded resulted in clearing swaths running through the 
larkspur area where most of the plants had been eaten. During this 
time they ate very freely, apparently relishing the taste of the lark- 
spur. Plate XY, figures 1 and 2, which were snapshots taken during 
the feeding, show how readily they took to the plant. The sheep 
were watched very closely for possible symptoms of larkspur poison- 
ing. No such symptoms, however, developed. All were brought 
back to the camp on June 17 not only none the worse for their ex- 
