DEATH CAMAS SPECIES, ZYGADESTUS 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 SYMPTOM- 



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. 



Duration of illness. 



Animal. 



Duration of illness. 



Sheep Nos.: 



450 



6 hours. 

 1 hour. 



do. 

 5^ hours. 

 10 minutes. 

 2i hours. 

 1 observation. 



do. 

 1 hour. 

 1 observation. 



Sheep Nos.— Contd. 

 580 





441 



585 





445 . 



588 





Ill 



599 





445 



604 





449 



564 





455 . 



569 



Do. 



455 



580 





571 



625 





574 



6°4 











The average time of all the cases was 5 hours and 17 minutes. 

 Sheep 599, which died, was sick 6^ 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 5S8, for example, the 

 plant was given in 9 feedings involving a period of 3 hours. The 



