x LIST OF ILLUSTRATIONS 



FACING PAGE 



14. A favourite breeding-place for domestic mosquitos . . 96 



15. A cesspool under a native hut will produce many mosquitos 



and much sickness . . . . . . .99 



16. Native child with an enormously enlarged spleen from 



malaria ........ 99 



17. The town of Ismailia on the Suez Canal, formerly very 



malarious ; now cleared of mosquitos and healthy. 

 Each house in the town is visited by a mosquito brigade 

 at the same hour of the same day every week . .107 



18. The town of Klang in the Federated Malay States, now 



free from mosquitos and healthy (after Watson) . .111 



