NEW AFRICA. 
61 
Sleeping Sickness has been known in Africa for more than a cen¬ 
tury, but its connection with the tsetse fly was not recognized until 1902. 
The infection, or organisms known as trypanosomes, is conveyed by 
this insect in some manner not yet clearly ascertained. The incubation 
period is about three weeks. Then comes an irregular fever, ranging 
Copyright 1909 by Underwood & Underwood 
CROCODILE CAUGHT ON THE SHORE OF LAKE VICTORIA NYANZA 
Natives live in terror of Crocodiles and kill them whenever they can. In some tribes no 
young man is considered a real warrior until he has speared a Crocodile. 
Then all the belles of the tribe worship him. 
