x LIST OF ILLUSTRATIONS 



FACING PAGE 



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



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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 



