CHAPTER XI 



OTHER MEASURES AND EXPEDIENTS AND POINTS 

 REQUIRING INVESTIGATION 



SCOPE OF THIS CHAPTER 



In previous chapters, the standard methods of mosquito 

 eradication and control have been discussed at some length. 

 In the present chapter, it is intended to outline various auxiliary 

 measures in dealing with mosquitoes — some of demonstrated 

 value; others still under investigation — and to call attention to 

 points that require further study and that may lead to results of 

 importance. 



It may be stated here definitely that we do not yet know, by 

 any means, all that is worth knowing about mosquitoes. There 

 are still many important questions that need clearing up, and it is 

 possible that, as they are cleared up, new and valuable methods 

 of procedure in eradicating mosquitoes will be developed. Also, 

 as our knowledge of the mosquito increases, it is not improbable 

 that it may be possible to effect considerable economies in 

 connection with present methods of control. 



Despite the present limitations of our knowledge, progress is 

 steadily being made. The problem of the mosquito is being 

 studied from many different angles, and a large number of 

 auxiliary methods of dealing with it have been proposed. In the 

 following sections, a few of these will be discussed. 



AUXILIARY METHODS AND EXPEDIENTS IN GENERAL 



It will be noted that the standard offensive methods already 

 described, such as drainage, oiling and fish control, are directed 

 chiefly against the mosquito in its early stages; they are designed 

 either to prevent it from ever coming into existence, as drainage, 

 or to destroy it before it matures, as oiling and fish control. 

 While screening is directed against the adult, it is purely pro- 

 tective, and has no offensive aspects. 



While these measures are undoubtedly based on correct 

 principles, nevertheless, there is no reason, theoretically, why 



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