195 
town it is nearly eighteenpence per head, owing to the extensive 
irrigation works which have to be regularly dealt with. 
It would seem, then, that the extermination of the domestic 
mosquito means the prevention of dengue fever, which, although not 
a very fatal disease, is one which causes endless misery in warm 
climates, and is as well a great hindrance to trade. 
LITERATURE 
1. Graham. Journal of Tropical Medicine, Febniarj' i, 1903 ' 
2. AsHBLRH AND CRAIG. Philippine Journal of Science. B. Medical 
Sciences, Vol. II, No. 2 , May, 1907. Quoted from Journal of the Royal 
Army Medical Corps, September, l<)07. 
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