12 BULLETIN 947, U. S. DEPARTMENT OF AGRICULTURE. 
tion continued. At 10.55 a. m. the animal appeared to be somewhat 
bloated, and breathing was noted as very irregular and noisy. The 
respiration was in groups of two or three, followed by holding of the 
breath after inspiration. These conditions continued unchanged 
during the day, the animal growing worse. On the morning of June 
27 it was found dead. 
In regard to the symptoms, it should be noted that the tempera- 
ture continued during the sickness practically unchanged, the 
extremes being 100.6° to 105.3°. The high temperature, however, 
was noted only once and in repeated observations the temperature was 
only between 102° and 103.6°. The respiration varied somewhat more 
widely, running from 36 to 150. There was, however, no continued 
period of rapid respirations. The animal apparently had naturally 
a somewhat rapid pulse, as, on the day before the experiment, it was 
found to be 114. During the whole period of the illness, however, it 
ran high, going up as high as 156 and not falling below 121. 
In the autopsy petechia were found on the surface of the heart and 
the trachea was somewhat congested, as were the lungs. In the 
alimentary canal the mucous membrane of the first, second, and 
fourth stomachs was congested. Congestion also was found in the 
duodenum, jejunum, and ileum, but not in the rectum. 
There was a small mass of coagulated serum in the rumino-reticular 
groove and in the anterior groove of the rumen. It was noted that 
the blood vessels beneath the skin were somewhat congested. 
Typical Case of Sheep 421. 
This sheep can be taken as typical of those cases of prolonged 
feeding in which the principal symptom produced by the H. hoopesii 
was weakness, and in which vomiting was not exhibited. The sheep 
was a ram received at the station June 6, 1917, and at that time 
weighed 95 pounds. On August 6 and 7 an attempt was made to 
have the animal eat Zygadenus elegans. This feeding did not pro- 
duce any effect. On August 27 a beginning was made of feeding 
H. hoopesii. At this time the sheep weighed 126.5 pounds. The 
general plan of feeding was to give the animal all the H. hoopesii it 
would eat, and with it was mixed more or less alfalfa hay to induce 
the animal to eat more readily. In preparing the material for feed- 
ing, ordinarily there was used from 3 to 5 times as much H. hoopesii 
as hay. In some instances, however, more hay was mixed with the 
uneaten H. hoopesii. Between August 27 and September 18 the 
animal ate 47.925 pounds of H. hoopesii per hundredweight of ani- 
mal. The total days of feeding were 23, but symptoms appeared in 
19 days after an average daily ration of 2.83 pounds of the plant. 
The sheep ate quite readily and appeared to be in good condition 
until September 6, when it did not seem quite right. Distinct symp- 
