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tissues to make the blood flow readily, and then she sucks out as 

 much of this blood as she needs. If she stings a person with 

 malaria she sucks out some of these parasites with that blood, 

 and if she' subsequently stings normal persons she injects some 

 of the parasites into their blood and then they get the disease. 



The affair is not as simple as the above paragraph would make 

 it seem, however, or else we would all have malaria most of the 

 time. It must be a particular kind of mosquito, the Anopheles 

 mosquito of one or more species that does the transferring, and, 

 furthermore, the biting of the sick person must precede the in- 

 fection of the new victim by a certain period. Still, if there are 

 enough of these mosquitoes and enough sick people around to 

 infect them, nearly all the well people will eventually get the 

 trouble. 



These particular Anopheles, or malaria-bearing mosquitoes, 

 are found only in certain kinds of stagnant or slow-moving 

 waters. And one of the localities in which they have been 

 found in New Jersey from the earliest settlers' records, is the 

 lowland south of and next to Princeton, N. J. About the worst 

 spot was one known as ''The Basin," about a half mile south of 

 the edge of the town. Here, in the last century, the Delaware 

 and Raritan Canal had been built through, and at this point 

 several (four) large basins had been constructed to allow the 

 canal boats to pass in and out of the line of traffic to unload 

 at their leisure. A customs house, the station of the Camden 

 and Amboy Railroad from New York to Philadelphia (now 

 removed), as well as hotels, dwellings, warehouses and other 

 buildings were erected and the surrounding grounds were cared 

 for, a certain amount of grass kept cut, and the waters were so 

 stirred and used by passing boats that they were not all probably 

 very good for the breeding of mosquitoes. 



The advance of civilization with its various engineering fea- 

 tures and changes of physical surroundings always favors some 

 forms of wild life and is against the welfare of others. On the 

 other hand, the recession of man from a civilized and occupied 

 area again changes the conditions so that some of the forms of 

 natural life have their state of prosperity altered. In the case 

 of the Princeton Basin we find a mixed condition from the start. 



