1910.| and T. rhodesiense as seen in Rats and Guinea-prgs. 215 
Lungs: a few living flagellates seen, four times as many rounding and 
rounded bodies seen [100 parasites counted in this and subsequent 
fresh preparations, when possible]. 
Bone marrow: many rounded bodies. 
Rat 2.—T. gambiense, Laboratory Strain, in White ? Rat, weight 
128 grammes, inoculated with 200,000 trypanosomes. 
Day ...... 1 | 2 {383 | 4 | 5 | 6 a | 8 9 10 11 12 
Parasites, per| — | — | — | — | 4 | 684] 3640 | 7392; 10,000 | 6320 | 1840 | 2200, killed 
yeue? mam. 
13101) eae 38 40 | 45 | 50 | 54} 60 | 55 58 44, 46 48 
| 
The internal organs of Rat 2 were in much the same condition as in Rat 1; 
further details are superfluous. 
B. Rat 3.—T*. rhodesiense in Piebald Rat, 2, weight 108 grammes, 
inoculated with 350,000 trypanosomes. 
Daye. aD a a 83 4, 5 6 a 8 9 10 
Parasites, per| — | — |172/|18,160 | 42,120 | 31,040 | 21,600 | 12,844 | 130,000 | 61,440, killed 
c. mm. 
MCAD. eaec ss. 22; 20 | 20 | 40 56 36 20 21 15 14 
Heart blood, fresh, of Rat 3: free trypanosomes seen. 
Spleen : many rounded bodies; no free trypanosomes seen. 
Liver: a few free trypanosomes seen. 
Lungs : about equal numbers of flagellates and rounded bodies. 
Bone marrow : rounded bodies. 
Rat 4.—TZ. rhodesiense in White Rat, 3, weight 120 grammes, inoculated 
with 600,000 trypanosomes. 
Day viceseoss: 1 2 3 4 5 6 
Parasites, per c.mm.....) — — 4, 896 2880 31,360 
EREMDS ccanetvctiecews cece 20 25 38 50 50 
DRY veasis actus a | 8 | 9 10 11 
Parasites, per c. mm.... 51,200 64,000 22,820 12,500 6144, killed 
BRETT ete cicsics cues odie nelnwsoei 48 47 13 20 31 
