54 C. A. Young—wSpectrum of the Corona. 
exposed to illumination from the prominences and upper _ 
_ portions of the chromosphere. This hight from the terrestrial — 
atmosphere, like that reflected by particles near the sun, is evi- 
dently partially polarized in radial planes. 
nd if there is between us and the moon, at the moment of © 
eclipse, any cloud of cosmical dust, the light reflected by this 
would come in as a /i/th element. It would, however, only dif- 
fer from that reflected by our own atmosphere by including a — 
greater or less modicum of photospherie sunlight. 
urthermore, in instruments like those employed by Messrs. 
Abbay and Pye, the chromosphere spectrum overlies that of the — 
corona, and increases the complication. 
+ would seem, therefore, that only a small percentage of the — 
light which falls upon the slit of the spectroscope during a total — 
eclipse contains the Fraunhofer lines at all, and it ought not to 
be considered strange that they are not readily observed. 3 
