THE PRELIMINARY SURVEY 129 



Appendix I 



Recommendations and Suggestions. — I. As a tem- 

 porary measure to partly control the development of 

 mosquitoes during the remainder of the breeding sea- 

 son, I recommend the application of oil to the stagnant 

 water known to be breeding mosquitoes, provided 

 that the stagnant water is within 300 yards of a dwell- 

 ing house. The oil should be a mixture of approxi- 

 mately 100 gallons of "stove distillate" and 5 gallons 

 of crude oil, applied in spray form from a special 

 sprayer, once every 15 days 1 up to the middle of 

 November. 



2. With the reconstruction of the ditch system 

 during the coming winter and spring, every ditch should 

 be put in good condition, with solid banks sufficiently 

 high to prevent overflow. Sufficient grade to give 

 good current should be provided. Where the ditch 

 runs through soil that permits any considerable seepage, 

 the ditch should be water-proofed, or the water carried 

 in a pipe. The ditches should be kept with clean banks 

 and free from weeds. The gates should be so con- 

 structed as to obviate leakage when shut, and should 

 be kept padlocked and operated only by the regular 

 ditch tender. 



1 During midsummer every twelve days. 



