49 d 
Rai 36—continued. 
Day . 
8 
9 
10 
11 
12 
'3 
l 4 
Number of Trypanosomes per 
c.mm. of blood 
34 , 35 6 
70,560 
75,600 
80,640 
168,544 
66,528 
125,400 
Atoxylin grains . 
ifh 
(fa 
- 
— 
..Vi 
— 
Day . 
'5 
t6 
'7 
t8 
>9 
20 
21 
Number of Trypanosomes per 
wran. of blood . 
Atoxylin grains . 
300,000 
A 
241,000 
336,000 
316,800 
404.800 
•jV 
337 ^ 92 ° 
363,000 
sir 
Day . 
22 
23 
24 
25 
26 27 
— 
Number of Trypanosomes per 
c.mm. of blood . 
410,000 
281,600 
138.OOO 
530,000 
483,840 500,000 
— 
Atoxyl in grains . 
— 
— 
— j A 
Rat 37 .—White, weight 256 grams, Adult. Treated in Animal House with small doses of 
atoxyl. Animal developed Pneumonia 
Day . 
1 
2 
3 4 
5 
6 
7 
8 
Number of Trypanosomes per 
c.mm. of blood 
_ 
__ 
- l - 
— 
4 
2,004 
32,640 
Atoxyl in grains . 
— 
— 
— 
* 
bV 
If now we examine table and chart of Rat 34 we ^ 
period between the crests of the waves representing the num ers 
trypanosomes was certainly longer than in those oi the untreate 
animals inoculated with T. rhodesiense ( vide Paper on Enumera 
Methods in Untreated Animals,’ H. B. Fantham an J- • 
Thomson*). We find there were two high crests in the grap i 0 is 
animal corresponding to five days and ten days. The 
this animal was 139 grams, and thus the doses ad ministe re_ 
• Proc. Roy. Soc., B. Vol. LXXX 1 II, 19 "- PP- 206-2U, and Ann> Tr ° P ' ^ 
Vo1 ' IV -PP- 4*7-463- 
