VIEW SHOWING OILING OPERATIONS FOR THE CONTROL OE MOSQUITO BREEDING 



Such pools as cannot be drained are sprayed with a mixture of one-half kerosene and 

 one-half crude petroleum once each week. For this work knapsack hand sprayers are used, 

 which enable the oilers to throw a stream of oil a distance of 20 to 30 feet. 



vaults, and parenthetically it may be re- 

 marked that the cost of construction of 

 these vaults has been reduced from over 

 $50 to an average cost of $12.07, includ- 

 ing labor and material (see page 270). 



WATCHING FOR SPUTUM-BORNE DISEASES 



The work, of course, is being con- 

 tinued. In fact, it may be said to be just 

 beginning. Of necessity all the year round 

 there must be a fight against the excreta- 

 borne diseases. From the 15th of Feb- 

 ruary to the 15th of September there 

 must be a ceaseless war upon the mos- 

 quito. From the 15th of September to 

 the 15th of April, the time in which peo- 

 ple are herded most closely together, 



every known measure must be taken to 

 control the acute sputum-borne diseases. 



By acute sputum-borne diseases is 

 meant mumps, measles, whooping-cough, 

 cerebro-spinal meningitis, and that horde 

 of general infections embraced by the 

 term "common colds." The great rem- 

 edy which society possesses in the combat 

 against these diseases is general education 

 in personal hygiene, so that infected indi- 

 viduals will take due precaution to pre- 

 vent the transference of their disease- 

 bearing sputum to others. 



Of course, everything which is being 

 done in this campaign helps to control 

 tuberculosis, and it may be predicted that 

 one of the by-products of the war will 



277 



