290 Prof, J. E. Salvin Moore and Mr. A. Breinl. [Mar. 9, 
PP RECCE Co 
S2ec Cs cL 
suena BREET 
CEFEEPRERIE 
a WE 
ENE 
Er 
ee eae a ey 
The two different 
29 30 31 32 33 34 35 36 37 88 39 40 41 42 
| LA 
Hokie 
—RHK AR = 
aaa eR 
a CHEE 
| 2 a Ea ee 
Be eee se 
ia | 
of latent bodies 
aS 
ae 
| 
se 
Bele ae 
ET 
| 
iE 
inci 
a 
Chart of Two Male Rats inoculated with Trypanosoma gambiense. 
Parasites rising to Period of formation 
Ist maximum. 
~ 
2 
Le 
= 
e 
~ ae ate a Pe 
Ss Leeks 
a jee Ze 
iS 
7 8 9 10 11 12 18 14 15 16 17 18 19 20 21 22 23 24 25 26 27 2 
The horizontal figures represent the days after inoculation: the vertical figures the numbers of parasites in a micro- 
scopic field of blood, the curve representing the variation in this during the course of the infection. 
curves represent two different infections. 
Ou 25 a3: 2 4-25 
where the infection runs a relatively prolonged course, the maxima and 
minima alternate again and again. The alternation is somewhat irregular, 
and does not possess the definite character of the analogous periods in a 
