34 



BULLETIN 947, IT. S. DEPARTMENT OF AGRICULTURE. 



TOXICITY OF FLOWERS. 



Table 9 gives the results obtained when fiowers of II. Jioopesii 

 were fed in the corrals: 



Table 9. — Summary of corral feeding of foivers. 



Animal. 



Sheep 343. 

 Sheep 357. 



1915 



Sheep 378. 

 Sheep 373. 



1916 



1917 



Sheep 446 



Average . 



Days 

 fed. 



Quantity fed per 

 hundredweight 

 of animal. 



Total. 



Pounds. 

 8.14 

 15. 936 



89. 643 

 72. 055 



Daily 

 average. 



Pounds. 

 1.36 

 1.77 



1.949 

 1.471 



2.272 



Days 

 before 

 sick. 



Days. 



25 



Quantity fed per 

 hundredweight 

 of animal to pro- 

 duce sickness. 



Total. 



Pounds. 



66.768 

 30. 303 



47. 755 



Daily 

 average. 



Pounds. 



1.964 

 1.595 



Result. 



Not sick. 

 Do. 



Sick. 

 Very sick. 



These results show that the toxicity of the flow T ers is practically 

 the same as that of the leaves. 



TOXICITY OF STEM LEAVES. 



The summaries of forced feeding of green leaves, in Tables 6 and 7, 

 were of experiments in which radical leaves were used. For the pur- 

 pose of comparison, forced feedings of stem leaves were made in 3 

 cases, as shown in Table 10. 



Table 10. — Summary of forced feedings of stem leaves. 



Animal. 



1915 



Sheep 331 



Sheep 340 



Sheep 347 



Days 

 fed. 



Num- 

 ber of 

 feed- 

 ings. 



Days. 

 1 

 1 

 1 



Quantity fed per 

 hundredweight 

 of animal. 



Total. 



Pounds. 

 2.645 

 2.645 

 2.756 



Daily 

 average. 



Pounds. 

 2.645 

 2.645 

 2.756 



Result. 



Died. 



Sick. 

 Not sick. 



With these animals the feeding was given in one day. Comparing 

 the results with Table 6, in which are summarized the feedings of 

 radical leaves in one day, it is evident that the dosage is practically 

 the same, not far from 2.5 pounds, with a considerable margin of 

 possible variation. 



COMPARATIVE TOXICITY OF DIFFERENT PARTS OF THE PLANT. 



Summarizing the averages of the feedings of different parts ol 

 the plant we get the following: 



Whole plant produced sickness when 2.17 pounds was fed daily for 21.6 days. 

 Leaves produced sickness when 2.228 pounds was fed daily for 21.58 days. 

 Flowers produced sickness when 1.943 pounds was fed daily for 25.1 days. 



