16 



she was fed 12 ounces, which caused death. The poisonous dose for a 

 cow of nearly 1,000 pounds weight would seem to be somewhere 

 between and -J of a pound of the freshly gathered old tubers. 



Feeding Old Water Hemlock Tops to Cattle. 



Table No. VIII gives the results of feeding old water hemlock tops 

 to cattle. 



TABLE No. VIII 



POISON PARSNIP (WATER HEMLOCK). THE OLD GREEN PLANT WITHOUT ROOTS 



FED TO CATTLE 



During four days a cow was fed 46 pounds, eating as much as 28 

 pounds in a single day. Later she ate 41 pounds in an afternoon 

 without any symptoms. 



A calf was fed 33J pounds in four days, eating as much as 12 pounds 

 in one day, without showing any symptoms. This shows, as did the 

 feeding of tops to sheep, that the old tops are not dangerous. 



Feeding Old Water Hemlock Tubers to Horses. 



Table No. IX gives results of feeding old tubers to horses. 



TABLE No. IX 



POISON PARSNIP (WATER HEMLOCK). FRESHLY GATHERED OLD TUBERS 

 FED TO HORSES 



Only two horses were fed one received eight ounces, J of a pound ; 

 and the other 15 ounces, nearly a pound. Both were made sick and 

 would have died. There w^s no hope for their recovery and they were 

 in such agony that they were shot for humane reasons. The poisonous 

 dose appears to be less for a horse than for a cow of about the same 

 weight (see Figure 8). 



Time Required for Symptoms to Appear. 



With sheep it took from 16 to 75 minutes for symptoms to appear. 

 In eight cases the average time was 39 minutes. The two cases in 

 which the earliest symptoms were not observed would probably have 

 increased the average a little. In the cow it took about an hour, and in 



