THE EDUCATIONAL FACTOR 



73 



To help answer these questions at least one lecture, 

 well illustrated by means of charts and other material, 

 should be given at the beginning of each campaign. 

 This we generally follow up with brief newspaper 

 articles, for the press is one of the greatest educational 



Fig. 33. School children taking lessons in practical hygiene. Searching for mosquito 

 wrigglers in pools near the schoolhouse. 



factors in America. Show-window displays in which 

 the properly labeled living insects are exhibited as they 

 pass through their various stages of development are 

 effective. The action of the oil can be thus also nicely 

 illustrated. The interest that this sort of display 

 arouses is immense and few merchants hesitate to 



