BRIGGS AND BELZ : INFLUENCE OF HAZE 



383 



termountain districts, is given in Table I. Since the eruption 

 of Mt. Katmai occurred early in June, the records for this month 

 are divided into two parts. At the foot of the table is given the 

 sum of the combined evaporation occurring at the 15 stations 

 for each month, designated as Hn. In Table II is given the evap- 

 oration for the corresponding periods during the summer of 

 1912, the combined evaporation for all of the stations during 



TABLE II 



Evaporation in 1912 at Stations in the Great Plain.s and Intermountain 



Districts 



each period being given at the foot of the table and designated 

 as 2e. 



In comparing the evaporation during 1912 with the normal 

 evaporation, two procedures have been followed. Fir§t, the ratio 

 (Ze/XriJ of the total evaporation occurring at all of the stations 

 during a given month in 1912 to the normal evaporation for that 

 period has been calculated (Table II). Second, the ratio of the 



