457 
Guinea-pig 10—continued. 
Day . 
128 
129 
130 
131 
•32 
•33 
•34 
Parasites per c.mm. 
66,000 
24,500 
10,000 
5,040 
1,008 
3,600 
3,888 
Temp. 
30 
22 
4° 
33 
54 
44 
63 
Day . 
•35 
• 36 
- 
•38 
•39 
140 
141 
Parasite* per c.mm. 
7,680 
5,760 
24,000 
5,760 
7,680 
19,440 
11,880 
Temp. 
44 
70 
44 
70 
78 
7 2 
96 
Day . 
... 142 
•43 
•44 
' 
•45 
146 
•47 
Parasite* per c.mm. 
... 6,480 
4,860 
2,268 
3,888 
4,480 
28,880 Died 
Temp. 
... 80 
76 
3° 
52 
•4 
O 
The graph of Guinea-pig 10 is represented in Chart 7. 
The incubation period in the case of guinea-pigs varies so 
in both strains that it is impossible to draw any definite cone usio 
therefrom. 
The duration of life of guinea-pigs inoculated with t e 
Rhodesian strain was shorter than in those similarly mocu a e 
T. gambiense (old laboratory strain); thus, the average 
guinea-pigs inoculated with T. rhodesiense was 59 ays, w 
life of guinea-pigs inoculated with T. gambiense averaged y • 
There is a tendency for the period between the crests of the 
waves in the graphs of guinea-pigs to be slig t y grea 
case of 7'. gambiense than in the case of 7 . rho( esiense 
