i6i 



mostly in the waters of the Basin and the extensions of these 

 waters in the lowlands east on the line of the Delaware and 

 Raritan Canal. Such pools and marshes as showed these larvae 

 or 'wrigglers' were carefully marked down on the map as solid 

 black circles. Secondly, a study of the mosquitoes on the wing 

 was inaugurated. Nine men went out just after sunset twice a 

 week for the whole summer and stood for half an hour with 

 bared forearm and a bottle to catch such mosquitoes as attempted 

 to bite them. They then moved to a second station and spent 

 another half hour as bait and ended the evening with a similar 

 period at a third station. These twenty-seven stations covered 

 the town and surrounding country in such a way as to show how 

 far the different kinds of mosquitoes flew and how thick they 

 were. Here was shown the fact that the malarial mosquito was 

 not the most abundant form and was a poor flyer from his birth- 

 place. But there were enough, and they wandered in diminish- 

 ing numbers up into the town from the basin and its eastward 

 extending chain of pools and other waters. 



"In the third place, a medical survey was made and all cases 

 of malaria were placed on the map as one-line circles. The town 

 was pretty well peppered with these, but the basin was riddled 

 with cases. Almost every house had some cases, in some every 

 member. One family of eight all had it. These victims were 

 able to get around. Some could work, while others could not, 

 and a few were perfectly healthy. The new cases suffered most 

 acutely. 



"An engineer next made a careful survey of the entire region 

 which menaced the town, and in collaboration with Dr. Headlee, 

 of the State Agricultural Experiment Station, planned the most 

 economical and efficient way of treating each pool, swamp, or 

 other body of water in order to make it impossible for Anopheles 

 to breed there. Small bodies of water were marked to be filled, 

 some large bodies to be drained in whole or in part, followed by 

 filling. Some waters that could not be eliminated were to have 

 their banks cut and trimmed. No temporary measures were 

 suggested. 



II MO 



