106 HOUSEHOLD INSECTS 



5. Coal oil on the surface of the water prevents the wrigglers from 

 breathing. 



6. Destroy the breeding places and you will destroy the mos- 

 quitoes. 



7. Empty the water from all tubs, buckets, cans, flower pots, 

 vases, once every forty-eight hours. 



8. Fill or drain all pools, ditches, unfilled postholes, and the like. 



9. Change regularly every day all water needed in chicken coops, 

 kennels, etc. 



10. Treat with coal oil all standing water which cannot be screened 

 or drained (1 ounce of oil will cover 15 square feet of surface). The 

 oil does not affect the water for use if the water is drawn from 

 below. 



11. Where oil is applied to standing water it must be distributed 

 evenly over the surface. 



12. Put fine wire screening over cisterns, wells, and tanks of water 

 in everyday use. 



13. Places in which it is undesirable to put oil, such as watering 

 troughs for stock, lily ponds, etc., can be kept free from wrigglers 

 by putting in goldfish or minnows. 



14. Clean away all weeds, grass, and bushes about ditches, ponds, 

 and other possible breeding places, since these afford a hiding place 

 for the mosquitoes. 



15. Clean up vacant lots and back yards of all cans, tins, bottles, 

 and rubbish. 



16. First do away with, or treat, all places where mosquitoes are 

 known to breed, and then begin to work on places where they might 

 breed. 



17. Inspect and treat with coal oil, gutters, culverts, ditches, 

 manholes, catching basins, etc., along the roadside. Manhole 

 covers should be screened. 



18. Houses should be cleared of mosquitoes by burning 1 pound of 

 insect powder or two pounds of sulfur to 1000 cubic feet of space. 

 The mosquitoes will fall to the floor and should be collected and 

 burned. 



19. Success in mosquito destruction depends upon the cooperation 

 of the members of the entire community. 



20. While the infection of yellow fever is carried by a single 



