184 



THE VENOM OF HELODERMA. 



FIG. 37. Rabbit 17, Experiment 3, Amount of venom slightly larger than in preceding experiment; if there was a 

 leucocytosis, it occurred at times other than when counts were made, 1 and 2 days respectively after 

 injection. 



Rabbit 17, Experiment 4. Amount of venom administered again increased. Slight rise in number of leuco- 

 cytes on third day after injection was probably not due to action of venom. It is difficult to explain why 

 no leucocytosis was found in this case; it may have occurred during the night. 



FIG. 38. Dog 1. Leucocytosis followed injection of venom, part of which was given intravenously 

 Dog 2. Leucocytosis followed intravenous administration of venom. 



