164 



DOUGLAS — RECORD OF BORINGS. 



[Nov. 1, 



Maximum and Minimum Temperatures, 



taken in the Sulphur Spring Valley, at 4500 feet above sea level, 

 and at Bisbee, at 5700 feet above sea level, both localities being in 

 the same latitude and twenty miles apart. 



Temperature in Sulphur Spring 

 Valley. 



Average. 



Temperature at Bisbee. 



Average. 



2 P.M. 



Average diurnal maximum 

 minimum 



Difference. ..... 



Diurnal Variation. 



. . . 92.6 j Average diurnal maximum . . 

 . . . 28.4 minimum . . 



64.2 



Difference. 



85.8 

 39-3 



46.5 



