f cline] 



RADIATION AT THE SURFACE OF THE EARTH 



137 



Fig. 14. 



Grovmd frozen the previous night. Bright day. 

 Temp. 8°C. Barometer 74 . 22 cms. 



0. M. 



T' r'i:-m 



I 1 9 V ^ i Ï r. y J' 



Fig. 15. 

 Sec. III., 1909. 9. 



