CHAPTER V 



THE ANTI-YELLOW FEVER CAMPAIGN AND ITS 

 RESULTS 



A FTER the arrival of Colonel Gorgas and his 

 ** assistants on the Isthmus, preparations for 

 the campaign were begun before the first case 

 of yellow fever was reported. As rapidly as 

 possible all barrels used for storing water were 

 made mosqvi!ito-proof. Wooden barrel covers 

 with wire-gauze protected openings were made 

 and shipped to the different villages. These 

 were nailed to the barrel tops by the sanitary 

 department, to leave no doubt of their remaining 

 mosquito-proof. An inch or so below the top 

 of the barrel an augur hole was made, and mos- 

 quito wire nailed over it. T^^is hole was intended 

 for an overflow, to prevent the water from coming 

 in contact with the wire-gauze covered opening 

 in the top, and thus inviting ovipositing. 



The covers were made by fastening together two 

 boards about twelve by twenty-four inches, leaving 



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