16 



Case No. 2 No. 42. 



A ewe weighing 75 pounds was fed 2 pounds of green arrow-grass 

 leaves at 11 : 40 a. m. ; at 12 : 05 p. m. she was walking with a stiff 

 peculiar gait the hindlegs far apart and held back. Soon muscular 

 twitchings commenced. At 12:25 p. m. the respiration was 25. At 

 1 2 : 30 she fell down, displaying spasms with a peculiarly regular up- 

 and-down movement of the head. Spasms occurred at short intervals 

 until a little before death. At 1 : 28 p. m. the respiration was 19. At 

 1 : 37 p. m. the mouth was held open with the tongue out and breathing 

 had almost ceased. Death occurred at 1 :.40 p. m. 



Autopsy showed moderately congested abomasum, spleen dark and 

 mushy, small intestine congested, lungs slightly congested; all other 

 organs apparently normal. 



Case No. 3 No. 26. 



A yearling wether weighing 73 pounds was fed 1^ pounds of green 

 arrow-grass leaves at 11 : 40 a. m. At 12 : 50 p. m. he was down on his 



Figure 7. Sheep in early stages of Arrow-Grass poisoning. 



belly with legs stretched out, mouth open; very audible breathing 

 through mouth, and distinct twitching movements of head and rolling 

 of eyes. At 1 p. m., respiration 16, temperature 103.2. Had a series 

 of spasms at regular short intervals until death, which occurred at 

 1: 15 p. m. 



Autopsy showed fourth stomach slightly reddened, small hemor- 

 rhages on heart ; spleen darkened ; all other organs apparently normal. 



Case No. 4 No. 46. 



A ewe weighing 70 pounds was fed 2J pounds of green leaves of 

 arrow-grass between 2 p. m. and 4 p. m. She commenced to feel dis- 

 tressed and acted unnatural almost as soon as the feeding was finished, 

 standing with head down, appearing very dull and caring little to 

 move about. This state of inactivity was maintained until 5 : 45 p. m. 

 when she commenced to brighten up, and at 7 p. m. appeared quite 

 normal, for she was eating a little hay. 



