CLIMATIC AND FOREST FIRES 



973 



^^ 





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: :-m;^mmmmm^ 



air currents. The high velocity, averaging 15.8 miles per hour, is 

 typical of the higher elevations throughout the Sierras and is in de- 

 cided contrast to the average of four miles per hour at the Feather 

 River Station, which is 3,500 feet lower and only about 6 miles distant 

 by air line. 



A short record at the experiment station in June, 1917, shown 

 on Chart 7, is also of considerable interest. Temperature, saturation 

 deficit of the air, wind velocity, and evaporation in sun and in shade, 

 are all found 1^0 follow the same course, exhibiting maxima at about 



