62 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I46 



-^ -flo 40-20 2p 4i0 60 



Fig. 51. — Solar constant (backcasted) versus solar contrast, 1913 to 1920. 



Brichtness Distribution Alonc Sun's Diameter 

 FoH Different Colors 



J-- - K. 



iNrRA-BCD f InrRA-RCO 



JKsi.SS/A Jin. 38^ 



ULTTH-VIOLtr 



Fig. 52. — Solar contrast, center to solar limb, observed, 5 wavelengths. 



