CONTENTS 
Page. 
1. Introduction. 5 
2. Occurrence and morphology of Trypanosoma Lewisi 6 
3. Cycle of development 7 
4. Multiplication by — 
(a) Transverse division 8 
(b) Longitudinal division 8 
(c) Segmentation 8 
5. Duration of the infection 9 
6. Motion of the trypanosome 10 
7. Symptoms in rats 10 
8. Staining of the parasite 11 
9. Active immunity 13 
10. Passive immunity 13 
11. Susceptibility of animals to Trypanosoma Lewisi 14 
12. Autoagglutination 14 
13. Agglutination 16 
(a) By immune serum 16 
(b) By normal sera 17 
(c) In the ice chest ... 18 
14. Transmission of the disease by — 
1. Intraperitoneal inoculation 18 
2. Subcutaneous inoculation 19 
3. Intrastomachal injection 20 
4. Feeding 20 
5. Fleas 21 
6. Lice 21 
15. Trypanosomes in Stegomyia fasciata 21 
16. The parasites outside the body 22 
17. The trypanosome of the hamster 23 
18. Trypanosomiasis as a disease of man (11 cases) 24 
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