Daylight Auroras

Abstract

I HAVE frequently seen the appearances described by Mr. Winstanley in your issue of August 3, and I think I must have seen the one he mentions. I have on two occasions watched similar phenomena caused by the moon. These phenomena require the cloud or clouds, from which they are formed, to be of about the same azimuth as that of the sun (or moon), and vary with the form and motion of the cloud, being, I think, simply a deflection of the sun's rays from the more salient points of the cloud. The streamers I saw on June 27 (see NATURE of July 9) were of an entirely different nature, rising near the south horizon somewhat to the east of the meridian, and flashing towards the moon, which had recently passed the meridian, while the sun was near setting in the N. W.