I was very desirous to know how this singular effect was produced, and at my request was taken to the stage. An opening in the back part of it was covered with pink colored glass. Powerful electric lights from below the stage were reflected through this glass upon it. The glass was highly refractive and so perfectly translucent, I at first thought there was none there, and when I stood upon its edge, and looked down into a fiery gulf below, I instinctively thought of the "Lost People," who are said to wander amid torturing yet unconsumable flames. But, happily, the ones I gazed upon were harmless ones. The street lights of Mizora were at a considerable elevation from the ground. They were in, or over, the center of the street, and of such diffuse brilliancy as to render the city almost as light as day. They were in the form of immense globes of soft, white fire, and during the six months that answered to the Mizora night, were kept constantly burning. It was during this period that the Aurora Borealis shone with such marvelous brilliancy. Generally, its display was heralded by an arc of delicate green-tinted light, that spanned the heavens. The green tint deepened into emerald, assuming a delicate rose hue as it faded upward into rays that diverged from the top until the whole resembled a gigantic crown. Every ray became a panorama of gorgeous colors, resembling tiny sparks, moving hither and thither with inconceivable swiftness. Sometimes a veil of mist of delicate green hue depended from the base of the crown, and swayed gently back and forth. As soon as the swaying motion commenced, the most gorgeous colors were revealed. Myriads of sparks, no larger than snow-flakes, swarmed across the delicate green curtain in every conceivable color and shade, but always of that vapory, vivid softness that is indescribable. The dancing colors resembled gems encased in a film of mist.