Abstract
THE beautiful after-glow of Friday, the 9th instant, was most striking as seen from the west side of Hampstead Hill, where its first development was made more effective by a frame of dark cumulus, with a fringe of dusky green tint, carried up from the sunset quarter by a westerly breeze, rather rolled up like a curtain, exhibiting the richly-coloured scene behind as it was with drawn. I estimated the altitude of the upper edge of the glow at about 30°; but at Freshwater, Isle of Wight, it has been described as extending nearly to the zenith. There would be no difficulty in calculating approximately the height of the cirrus—as desired by Mr. Russell—if it could be assumed that the reflection was from the same matter in both cases, which is improbable.
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