306 



ENVIRONMENTAL CONDITIONS. 



Table 16. — Weekly precipitation (P) and weekly rates of evaporation (E), the latter from 

 cylindrical porous-cup atmometers, summer of 1908. 



^ Calculated from 2-week total. 



* Precipitation data from monthly weather reports. 



* Precipitation data are for Jacksonburg. 



* T means trace, less than 0.01 inch. 



