i6 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. ']'] 



Solar Radiation above 1.980(2% above normal) 

 Pressure same day Winter half year 



Solar Radiation 1.961-70 (T/o above normal] 

 Pressure same day Winter half year 



Solar Radiation 1.951-60(o,57.above normal) 

 Pressure same day Winter half year 



Fig. 9. — Mean pressure deviations from normal following differ- 

 ent intensities of solar radiation in steps above 1.950, winter half- 

 year. Units in hundredths of an inch. Same day. 



