22 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. ']'/ 



Solar Radiation below 1,911 ( 25o below normal! 

 Pressure 2 days later Winter half year 



Solar Radiation 1.921-30 (l^b below normal) 

 Pressure 2 days later Winter half year 



Solar Radiation 1.931-40 (oj552 below normal) 

 Pressure 2 days later Winter half year 



Fig. 14. — Mean pressure deviations from normal following dif- 

 ferent intensities of solar radiation in steps below 1.941, winter 

 half-year. Units in hundredths of an inch. Two days later. 



