Mosquitoes and Yellow Fever 131 



the making habitable of certain places which here- 

 tofore a white man has entered only at the risk of 

 his life. It means that quarantines need no longer 

 be established when yellow fever breaks out in a 

 district; quarantines which have inevitably caused 

 the loss of millions of dollars to the world of com- 

 merce. 



RESULTS IN HAVANA 



The first practical work based on these findings 

 was done in Havana. The Yellow Fever Commis- 

 sion made their recommendations in 1900. In 

 1901 and 1902 they were put into effect. The fol- 

 lowing table of the death rate there during a period 

 of ten years shows graphically the results : 



DEATHS IN HAVANA FROM YELLOW FEVER 





i893 



1894 



189S 



1896 



1897 



1898 



1899 



1900 



1901 



1902 



Jan. 



15 



7 





10 



69 



7 



1 



8 



7 



0 



Feb. 



6 



4 



4 



7 



24 



1 



0 



9 



5 



0 



Mar. 



4 



2 



2 



3 



30 



2 



1 



4 



1 



0 



Apr. 



8 



4 



6 



14 



7i 



1 



2 



0 



0 



0 



May 



23 



16 



10 



27 



88 



4 



0 



2 



0 



0 



June 



69 



3i 



16 



46 



174 



3 



1 



8 



0 



0 



July 



118 



77 



88 



116 



168 



16 



2 



30 



1 



0 



Aug. 



100 



73 



120 



262 



102 



16 



13 



49 



2 



0 



Sep. 



68 



76 



135 



166 



56 



34 



18 



52 



2 



0 



Oct. 



46 



40 



102 



240 



42 



26 



25 



74 



0 



0 



Nov. 



28 



23 



35 



244 



26 



13 



18 



54 



0 



0 



Dec. 



11 



29 



20 



147 



8 



13 



22 



20 



0 



0 



