428 
Rat 22.—White $, weight 125 grams. Dose: 1,500,000 Trypanosomes. (H.B.F., 
Day 
... , 
2 
3 
4 
5 
6 
7 
Parasites per c.mm. 
244 
18,000 
66.560 
81,000 
176,8k 
Temp. 
20 
22 
30 
26 
20 
6 
0 
Chart 
240.000 
230,000 
220,000 
210.000 
200,000 
130,000 
1 80,000 
1 70,000 
160,000 
150,000 
140,000 
130,000 
120,0001 
110,000 
100,000 
90,000 
80,000 
70,000 
60,000 
50,000 
40,000 
30,000 
20,000 
10,000 
1,000 - 
500 
lOO - 
«—■ —a—.-j . - ;—i_i_!_ j 1 ? ! 1 ; ■— 
J. Graph showing Daily Counts of the Parasites per c.mm. in the Peripheral Blood 0: 
• inoculated with T. gambiense. Periodic Variation. (See record of Rat 23.) 
(£) Trypanosoma gambiense 
I.—RATS EXHIBITING PERIODIC VARIATION 
Rat 23.— Piebald, weight 173 grams. Dose of inoculation: two million Trypanosome*. 
CJG.T.) 
Day 
Parasites per c.mm. 
Temp. 
55 
40 
5 ° 
5 ° 
44 
34 
120 
S' 
