LARKSPUR POISOlSriNG OF LIVE STOCK. 



67 



figures indicate the number of the animal in each case. The letter S 

 indicates that the animal was fed seeds, and the letter L that leaves 

 were used. 



At first glance these charts do not seem to be very instructive. It 

 will be seen that the quantities of Delphinium harheyi necessary to 



-y^U6i/ST- 



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30 



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S /O /S 20 ZS SO 4- 9 /4- /9 24- 29 3 8 /3 /8 



/90 

 /80 

 /70 

 /SO 

 /SO 

 /40 



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^90 

 ^ 80 

 ^70 

 60 

 50 

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 30 

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97 



603 



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608 



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Fig. 6. — Chart of feeding of Delphinium harheyi to cattle experimentally poisoned in 

 1909, showing dates, quantities fed, and duration of feeding. • indicates plant 

 collected near station ; X indicates plant collected at Kebler Pass about 1,000 feet 

 higher than the station ; those marked L received leaves and stems ; those marked 

 S received seeds and the pods and stems bearing them ; all the others received the 

 whole top of the plant. The short horizontal line indicates duration of feeding. 

 The weights of plant are given per thousand pounds of animal. 



produce poisoning in 1909 varied from 30 pounds in the case of No. 

 92 to 188 in the case of No. 604. , In 1910 the quantities varied 

 from .30.4 pounds in the case of No. 98 to 280.8 pounds in the case 

 of No. 625, while with the Delphinivmi menziesii the quantities varied 

 from 62.2 pounds in the case of No. 113 to 116.5 pounds in the case of 

 No. 82. In 1911 only Delphinium lyarbeyi was fed and the quantity 

 necessary to produce poisoning varied from 34.7 pounds in the case 



