Smithsonian Report, 1937.- Mitchell 



^^^teii 



!d 



East 



/ 



East 



^ 



I 

 I 



West 



Eclipse Spectra in 1930 Photographed by Concave Grating Without Slit. 



-4 and B refer to the same eastern portion of the sun. For purposes of comparison the positions in C at 

 the western edge of the sun are inverted. 



In A are given the K line and the Ha line, both from the chromosphere. In B and Care given (from left to 

 right) details from direct photographs of the corona near the beginning (B) and the end (C) of totality, 

 and the structure in the coronal rings at wave lengths 5303 and 637'1, respectively. 



