46 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 'JJ 



1.940- 



1.935— 



Side of stin with spot 



Spotin 



Days center Days 



before of Stm after 



6 4 2 2 4 6 



f I I I I I I 

 I 1921-24 Tj 



Side of Sun away from spot 



8 10 12 14 16 18 20 



I I ? I il I I 



D 



Fig. 36. — Solar radiation in relation to the position of spots on the sun 



