n8 MALARIA 



dren about the rock piles looking for ponds. Took 

 photos of a few of them. 



April 8, 1910. Demonstrated by chalk talk and 

 bottle of wrigglers to school children at Thermalito 

 the work of the league. Found a ditch with Anoph- 

 eles mosquito wrigglers near the schoolhouse. In- 

 spected the ground about Oro Vista and El Medio. 

 Found leak in the Palermo Land and Water Company's 

 ditch above reservoir which caused a large field to be 

 flooded and made great breeding places for Anopheles 

 mosquitoes. 



April 9, 1910. Professor Herms came up and 

 visited some parts of field work, in particular the 

 ground about the reservoir. Inspected the El Oro 

 dredger ground and flagged many old mining shafts 

 and ponds containing water and demonstrated the 

 mosquito work to the superintendent there. 



April 11, 1910. Put man to work oiling and re- 

 pairing ditch in the field above the reservoir. Flagged 

 another field on opposite side of the ditch into which 

 some water from ditch was overflowing and where 

 many Anopheles wrigglers were found. Found a few 

 Culex eggs. 



April 12, 1910. Prepared some more window ex- 

 hibits for the business section and demonstrated the 

 work of the league to the high school students and 

 continued the flagging of the El Oro dredger ground. 

 Showed the men belonging to the Company method of 

 oiling. 



