of mist, the light of the sun; white beams mixed with innumerable rays of all colours in a confusion, of indescribable brilliancy. I presume that the total obscuration of everything outside the cloud during my passage through it was due to its extent and not to its density, since at that height it could not have been otherwise than exceedingly light and diffuse. Looking upward through the eastern window, I could now discern a number of brighter stars, and at nearly every moment fresh ones came into view on a constantly darkening background. Looking downward to the west, where alone the entire landscape lay in daylight, I presently discerned the outline of shore and sea extending over a semicircle whose radius much exceeded five hundred miles, implying that I was about thirty-five miles from the sea-level. Even at this height the extent of my survey was so great in comparison to my elevation, that a line drawn from the vessel to the horizon was, though very roughly, almost parallel to the surface; and the horizon therefore seemed to be not very far from my own level, while the point below me, of course, appeared at a vast distance. The appearance of the surface, therefore, was as if the horizon had been, say, some thirty miles higher than the centre of the semicircle bounding my view, and the area included in my prospect had the form of a saucer or shallow bowl. But since the diameter of the visible surface increases only as the square root of the height, this appearance became less and less perceptible as I rose higher. It had taken me twenty minutes to attain the elevation of thirty-five miles; but my speed was, of course, constantly increasing, very much
