94 MALARIA 



have resigned at this time, as it was impossible to get 

 an experienced man for continuous work during the 

 rest of the season, especially so because of the fact that 

 it is usually during September and October that the 

 greatest number of cases of malaria seem to develop, 

 and therefore the greatest vigilance should be exercised 

 at that time. 



Mr. Davidson was succeeded by Mr. Harold F. Gray, 

 who arranged to devote two days a week to the cam- 

 paign, commencing on September 16th. Owing to 

 the small amount of time available, the territory covered 

 was reduced to the immediate vicinity of Penryn, and 

 more time than heretofore was spent on publicity and 

 educational work. Instructions concerning malaria- 

 control methods were posted in prominent places, an 

 endeavor was made where time permitted (and the 

 opportunity) to talk personally to the people ; a large 

 number of the July Bulletin of the State Board of 

 Health containing Professor Herms' article on malaria 

 control ("How to control Mosquitoes, with Special 

 Reference to Anopheles") was distributed; and a talk 

 was given to the local school children on the relation 

 of the mosquito to malaria, illustrated by photographs 

 kindly supplied by Professor Herms, and by actual 

 demonstrations of the larvae in the field. The two 

 varieties (Culex and Anopheles) were grown under 

 glass jars in the classroom from larvae to adults. A 

 talk to the school children on the same subject was 

 given by Mr. Leak -on May 5th. 



