242 proceedings: Washington academy 



a great extent on the direction of wind, and the relation between solar 

 constant and the direction of wind in Washington may be very com- 

 plex. The solar constant for the period 1902-1912 averaged 1.93 and 

 values as low as 1.85 appeared often. During the years 1914 to 1920 

 it averaged 1.95 and seldom fell as low as 1.90. In September, 1919, 

 1.93 was again the mean value, while for October, November and 

 December it had risen to 1.96. Notwithstanding this recent increase 

 we have a cold winter in the United States. 



Robert B. Sosman, Corresponding Secretary. 



