THE WHORLED MILKWEED AS A POISONOUS PLANT. 



27 



more commonly tlie spasms continue until death. Generally the 

 spasms occur at short intervals and there may be as many as 4 or 

 5 in a minute. They become somewhat reduced in intensity toward 

 the end. Death comes from respiratory paralysis. 



Fig. 3. — Temperature curve of Sheep 483. 



The symptoms may be considered as falling into four more or 

 less clearly marked stages: 



1. A period of partial paralysis with staggering movements and 

 fallinp'. 



/as 

 /oe 



\ 



I /OS 

 /02. 



3 /o // /^ /■ z y ^ 3- e ^ ^ s /o // /^ / z J" ^ ^ e-r^y 9 /o // /z / z J" ^ s- e 



1 



r_ tr t r-tt-t- 







i 



1 ^ _L 





_1| j_ '^It'^i-LL J_ it 



Fig. 4. — Temperature curve of Sheep 402. 



2. A short period of violent spasms. 



3. A period of spasms accompanied with running movements. 



4. A period when spasms are of less intensity until death comes 

 by respiratory paralysis. 



