WESTERN SNEEZEWEED AS A POISONOUS PLANT. 
35 
The difference in the toxicity of the different parts of the plant 
therefore is negligible; also the comparison just mentioned shows 
that there is practically no difference between the radical leaves and 
stem leaves. 
EFFECT OF DRYING ON TOXICITY OF LEAVES. 
A few feedings were made to determine whether drying of the 
leaves caused any loss of toxicity. Table 11 shows the results. 
Table 11. — Summary of forced feeding of dry leaves. 
Animal. 
1916 
Sheep 376 
1917 
Sheep 409 
Sheep 439 
Sheep 422 
Days 
fed. 
Num- 
ber of 
feed- 
ings. 
Days. 
2 
1 
4 
5 
1 
3 
5 
Quantity fed per 
hundredweight 
of animal (esti- 
mated as green 
plant). 
Total. 
Pounds. 
3.475 
2.301 
11. 305 
10. 776 
Daily 
average. 
Pounds. 
3.475 
2.301 
2.826 
2.155 
Result. 
Symptoms, 
Do. 
Sick. 
Symptoms. 
Averaging the two cases fed in one day, the toxic dose of dry leaves 
in terms of green plant is 2.888 pounds. Averaging the two cases 
given prolonged feeding, 2.49 pounds daily for 4J days produced 
sickness. 
As it is shown in Table 6 that the toxic dose of green leaves 
given in one day is 2.494 pounds, and in Table 8 that 1.281 pounds 
of green plant given for 4J days produce sickness, it appears that 
the dry plant given by forced feedings is not so toxic as the green 
plant. 
The prolonged feedings of the dry plant, however, gave somewhat 
different results. The cases are listed in Table 12: 
Table 12. — Summary of prolonged feedings of dry leaves. 
Animal. 
Quantity per hun- 
dredweight of 
animal to pro- 
Days d uce sickness, 
before 
sick. 
Total. 
Daily 
average. 
Result. 
1916 
Sheep 392 
Sheep 395 
Sheep 374 
Sheep 375 
1918 
Sheep 471 
Sheep472 
Average , 
Days. 
15 
18 
14 
15 
21 
16.5 
Pounds. 
34. 011 
21. 712 
43.043 
28. 467 
44. 094 
34.45 
34. 296 
Pounds. 
2.267 Very sick. 
1.206 i Symptoms. 
3.074 Very sick. 
1. 898 ' Sick. 
2. 1 I Symptoms. 
2.15 Sick. 
2.116 
