54 



BULLETIN 365^ U. S. DEPAETMENT OF AGEICULTUEE. 



time evidence of pain was less marked. Xo further pronounced 

 symptoms appeared during the day of September 2. 



On the morning of September 3 he still exhibited some trembling 

 of the muscles of the hind legs and of the flanks and his gait showed 

 the same symptoms of stiffness as seen on the preceding day, but 

 during the day his condition improved. On this day he ate 6 pounds 

 of leaves, stems, and seeds. On the morning of September 4 he 

 appeared to be in good condition. The feeding was resumed, and he 

 ate about 12 pounds of DelpMnium harbeyi. During the latter part 

 of the forenoon and in the afternoon he again showed distinct symp- 

 toms of poisoning. The back was arched much of the time and he 

 straddled in walking. There was distinct evidence of abdominal 

 pain. During much of the time he exhibited trembling in the super- 

 ficial muscles. Sometimes in lying down he would groan, evidently 

 being in severe pain. Gradually, however, he recovered, and on the 

 morning of September 5 appeared to be again in normal condition. 



He was fed again, from September 9 to September 14, receiving 

 fresh material of DelphiniuTn harbeyi collected at Kebler Pass. 

 During this time he ate 126.75 pounds. There were no distinct evi- 

 dences of poisoning from this feeding, although he appeared some- 

 what dull. 



The results of these experiments seemed to prove conclusively that 

 horses can be poisoned with larkspur and that they have the same 

 general symptoms as cattle. Table YTl gives the summary of these 

 feeding experiments. 



Table VII. 



-Summary of feeding experiments upon horses witJi DelpMnium 

 barheyi, 1909. 



No. of 

 animal. 



Weight of 

 animal. 



Amount 



of plant 



fed. 



Date of feeding. 



Part of plant fed. 



72 



Pounds. 

 700 

 600 

 700 

 600 

 600 

 700 

 600 



Pounds. 

 11 



168.5 



192 



6 



12 



78.25 

 126. 75 



1912. 

 July 9-10 



Leaves and stems. 

 Leaves, stems, and see 



Do. 



Do. 



Do. 

 Seed and seed stems. 

 Leaves and stems. 





78 



Aug . 24-Sept . 2 



d. 



72 



Aug. 24-Sept. 4 





78 



Sept.3 





78 



Sept.4 





72 



Sept. 9-14 





78 



do 











No. of 



animal. 



Time sick until able to 

 stand. 



Remedy used. 



Result. 



Amount 



fed to 1,000 



pounds of 



animal 



weight. 



Location from 



which plant 



fed was 



obtained. 



72 









Pounds. 

 15.7 

 280. S 



274.3 

 10 

 20 



111.8 

 211.2 



Near station. 



78 



Sick, but a 



ble to stand. 





Recovery . . . 



Kebler Pass 



72 





mostly. 

 Do. 



78 



Sick, but a 

 do 



ole to stand. 





Recovery 



do 



Kebler Pass. 



78 





Do. 



72 









Do. 



78 







Do. 





' 





