12 
BULLETIN 1391, U. S. DEPARTMENT OF AGRICULTURE 
Fig. 7. — Sheep No. 373 showing extreme 
weakness ; it could stand only a 
minute or two before it trembled and 
fell 
tions were made in regard to temperature, pulse, and respiration. 
The animal was fed hay until June 25. 
June 25. The experimental feeding of Aplopappus heterophyl- 
7us was commenced. The material was stems and leaves which had 
been collected near Roswell, N. Mex., in January, 1920. It was 
planned to give the animal approximately 2 pounds of green plant 
per hundredweight of animal daily. 
With the first feeding of Aplopap- 
pus was mixed 1 pound of alfalfa 
hay. The succeeding feedings 
were in practically this ratio, 
the attempt being made to have 
HHT <""^S-a tlH ' an ' m:,l « i*' possible, eal its 
**~*~" • ''"™l^ jififciL**^^ '""" " l ,<,im( ' s °*' Aplopappus daily. 
As a control, sheep No. 587 was 
kept in the corrals during the 
same time, was fed alfalfa hay, 
and given the same exercise. The 
feeding was continued until July 
1 without anything unusual being 
noticed. 
July 1. While being exercised sheep No. 589 showed itself less 
active than the control, sheep No. 587. When placed back in the 
pen, sheep No. 589 immediately lay down, while sheep No. 587 re- 
mained upon its feet and commenced eating hay. Nothing more was 
noticed until July 3. 
July 3. Both sheep were again exercised. While sheep No. 587 
remained active and showed no indications of weakness, sheep No. 
589 after a few minutes began to lag and showed a great disinclina- 
tion to move about with any rapidity. 
July 7. When exercised with sheep No. 587, sheep No. 589 lagged 
continually and soon stood still in the corner of the corral, refusing 
to move except under distinct 
urging. The animal continued 
quiet and stupid during the time 
from July 8 to 12. 
July 12. While the sheep was 
standing at the feed box in the 
morning it was noted that the 
shoulders were trembling. He 
walked across the corral with his 
back humped up and feet drawn 
under him, trembling violently 
in the shoulders and less markedly 
in the hips, and lay down. In a 
minute or less he was upon his 
feet and walked about normally. Immediately the trembling com- 
menced again and he was obliged to lie down. This 'was repeated 
several times, although later in the forenoon he no longer exhibited 
trembling. 
July L3. When exercised by being driven about the corral, he 
moved in a stiff -legged manner 
show trembling. 
•-"i.-.- 
Fig. 8. — Sheep No. 589, July 17. when so 
sick that it trembled and fell after 
being on its feet only a few minutes 
and was very stupid, but did not 
