DEATH CAMAS SPECIES, ZYGADENUS ELEGANS. 21 
Weakness.—Pronounced weakness was noted in 14 of the animals. 
Temperature.—There was no evidence of any effect on temperature. 
In this connection perhaps it should be noted that none of the animals, 
with the exception of Sheep 599, were very sick, and few temperature 
observations were made on this animal. 
Pulse.—No effect on the pulse was noted. 
Respiration.—Sheep 599, which was very sick and died, had an 
irregular respiration that at times was labored. Irregular respiration 
was: noted in Sheep 625. In other cases labored respiration was 
noted. : 
Trembling and heightened reflexes.—It is interesting to note that 2 
animals, Sheep 588 and 599, exhibited hyperesthesia, and one, Sheep 
599, showed muscular trembling. These symptoms were noted 
quite generally in the Z. gramineus cases seen in Montana, but were 
not seen in the Z. paniculatus animals. | 
In general, the symptoms closely resembled those seen in the 
effects of the other species of Zygadenus, differing only in degree. 
DURATION OF SYMPTOMS, 
Table 7 shows the time during which the symptoms continued. 
As in the similar table for Z. paniculatus, the time was computed 
from the first noted symptom to the last observation. 
— 
TaBLE 7.—Duration of symptoms. 
Animal. 3 Duration of illness. Animal. Duration of illness. 
Sheep Nos.: ; || Sheep Nos.—Contd. 
TAD OE ites ea toes a | 6 hours. || OSE See RE sakes 5 hours. 
ca a AAS regres apo 1 hour. OOM see eee 1 observation. 
SABE Sos nee aha Sys fig UC) | ODS eae ees sae satel. 15 hours. 
LA tee ee ee | 54 hours. OO ere aieingys Seaway saber 64 hours to death. 
Oi pa ia ee ee | 10 minutes. i GOA ec ee ES 20 hours. 
AO i ie ns reese 34 | 24 hours. 1] Gy Ra cea ea ice _.-| 3 hours. 
Sa 2 eee Pre | 1 observation. Wein BO een tcma waar Dor 
Le eee dae aan ae ee dO. HACE a) ier a ea 43 hours. 
DU ERE ene ee 1 hour. | G25 reais Gora seu 20 hours, 6 minutes. 
(Lema lope eames _ 1 observation. eae 32). een aie eine 11 hours, 19 minutes. 
The average time of all the cases was 5 hours and 17 minutes. 
Sheep 599, which died, was sick 64 hours. The shortest periods of 
_ illness were those in which a single observation was made; the longest 
was 20 hours and 6 minutes. 
As compared with Z. paniculatus the sickness was of shorter 
duration. 
: TIME REQUIRED TO PRODUCE SYMPTOMS. 
Table 8 states the time elapsing between the feeding of the plant 
and the development of symptoms. In some of these cases repeated 
feedings were made, so that the administration of the plant extended 
over a considerable period of time. In Sheep 588, for example, the 
plant was given in 9 feedings involving a period of 3 hours. The 
