208 H. A. Hazen—The Sun Glows. 
clude that the latter have increased within a few months, not. 
manifested however in their usual manner. 
Lastly, the arrangement of the “strie” in the so-called 
“polar bands,” attributed by Professor Loomis to electrical 
action, also supports the view here presented. - 
The three conditions, above, enable us to explain all the facts. 
thus far developed. First: They must all be existent for the 
best display. If either of the latter two gradually or suddenly — 
increase or diminish, it would account for the intermittent 
action. Second: Granting the presence of “ frost particles” im 
abundance, the appearances can be easily accounted for, as they 
are similar to those we recognize when water or frost particles 
are the cause, whether produced by diffraction or other 
wise. Third: The transparent nature of the frost particles 
enables us to see faint stars, which certainly an opaque oF 
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descriptions of glows January 27th, February 2d and 34, 
show that the strie or grayish, cloud-like, stratified forms are 
the true cause of the glows, for if there were other clouds there 
immediately followed a “high” while the other a Boats, ? 
decided that watery vapor had nothing to do with the glow: are 
is evident that in order to come to such 2 conclusion, it must 0? 
ently of either. Asa matter of fact most of the more brilliant 
after-glows have been seen in front of a high area, He 
‘reasonable to suppose, is not due to an intimate conny h 
between the two or the necessity of the presence of the : hig b 
to show the glow, but simply to the clearing of the air 10 _ 
of the “high,” which gives a more favorable opportunity | 
observation. It is objected that there is a distinct inter’ 
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