74 



MALARIA 



allow at least a part 

 of their windows to 

 be so used. 



A laboratory may 

 or may not be estab- 

 lished in which the 

 more scientific phases 

 of the subject are il- 

 lustrated by means of 

 the microscope and 

 other apparatus. The writer has found such a labo- 

 ratory very valuable, since it gives the inspector an 



Fig. 34. School boys locating myriads of mos- 

 quito wrigglers in boats partly rilled with water. 



Fig. 35. School children searching for mosquito wrigglers in an old dredger pond. 



