Knmrleliir. 



NORTH. 



SOUTH. 



PHOTOGRAPH OF THE SUN IN " K-LIGHT," SHOWING CALCIUM CLOUDS. 



Taken with the Rumford Spectroheliograph, attached to the great 40 inch Refractor of the Yerkes Observatory, by Prol. GEORGE E. HALE 

 and Mr. FERDINAND ELLERMAN, 1903, April 27, loh. 52m., Central Standard Time. 



