ACTION ON THE CELLULAR ELEMENTS OF THE BLOOD. 



181 



Fig. 33. Rabbit 13. Simultaneous counts were made from a vein of the ear and one of the mesentery; that of the ear 

 was high, that of the mesentery lower; the count of the mesenteric vein fell after venom had been injected. 



Rabbit 14. An initial high leucocyte count was found in both the blood from the ear and the mesenteric 

 vein. After injection no striking rise in the leucocytes from the ear- vein was noted, and there was a 

 marked fall in the number of leucocytes in the blood of the mesenteric vein, followed by a slight rise. 



Rabbit 15. A very marked fall in number of leucocytes was observed in blood of ear-vein, associated with 

 a slight fall in number in mesenteric vein of a rabbit that had a preexisting leucocytosis following injec- 

 tion of a relatively small dose of venom. 



Hb. R.b.c. 9.45 9.55 10.05 10.15 10.25 10.35 10.45 10.55 11.05 11.15 11.25 



36,000 

 34,000 

 32,000 

 30,000 

 28,000 

 26,000 

 24,000 

 22,000 

 20,000 



18,000 



16,000 



14,000 



12,000 



10,000 



8,000 



6,000 



4,000 



2,000 



Fig. 34. Rabbit 16. A rise in leucocytes of blood of ear-vein was found after injection of venom, with a considerably 

 lower number of leucocytes in successive counts taken from veins of abdominal cavity (mesenteric vein, 

 splenic vein, vena-cava). In this experiment an initial fall in number of leucocytes could be excluded 

 through repetition of early counts. 



