IRRIGATION IN FLORIDA. 



lines represent the total rainfall during these periods, up to 4 inches. 

 Many 10-day periods had more than 4 inches of rainfall, but the 

 charts were made to show periods of rainfall rather than down- 

 pours. In general, the rainy years show a preponderance of black 

 spaces and the dry years a preponderance of white spaces. 





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Jan. 



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Mau June\Jviy 



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Fig. 2. — Chart showing rainfall of 4 inches or less for each 10-day period, 1892-1914, 



at Pensacola, Fla. 



The Hypoluxo chart (fig. 1) shows heavy rainfall in the sum- 

 mer months although that district is liable to long and severe droughts. 

 Many of the black spaces in this chart represent considerably more 



Note. — Although the rainfall charts do not indicate each shower the cumulative rain- 

 fall for each 10-day period totalling less than 4 inches can be read to within one-fifth of 

 an inch; for example, see the Pensacola chart (fig. 2). The month of September, 1893, 

 shows 1.8 inches rainfall the first 10 days ; 1.0-inch the second 10-day period ; and 1.2 

 inches the last period, or a total of 3 inches for the month. It will be seen that no rain 

 fell in November of the same year and 4 inches or more fell in the first 10 days of Feb- 

 ruary, 1894. 



