CHAPTER I 



THE STATUS OF KNOWLEDGE OF ANTI-MALARIA 

 WORK IN 1904 AND THE CAMPAIGN AT HAVANA 



'T^HE anti-malaria work of importance accom- 

 -*■ plished previous to 1904 was that done by 

 Colonel Gorgas in Cuba and Sir Ronald Ross in the 

 British Colonies in the East. 



The necessity for mosquito control has been 

 appreciated since it was first demonstrated that 

 some mosquitoes may transmit disease. Since 

 1900 great progress has been made in the study of 

 the life history and habits of mosquitoes. As a 

 result, we find remarkable differences in habits, 

 even among species of the same genus. The 

 determination of such facts is of great importance 

 in the economic control or eradication of the dis- 

 ease-conveying species, and also in that of other 

 genera that affect personal comfort or real estate 

 values. 



It is realized that conditions pertaining to 

 Anopheles control on the Isthmus and the habits 



3 



