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 port for the body's centre of gravity; and further to find on experiment that it was possible to remain for a couple of hours with my heels above my head, in the favourite position of a Yankee's lower limbs, without any perceptible congestion of blood or confusion of brain.

I was occupied all day with abstract calculations; and knowing that for some time I could see nothing of the Earth—her dark side being opposite me and wholly obscuring the Sun, while I was as yet far from having entered within the sphere where any novel celestial phenomena might be expected—I only gave an occasional glance at the discometer and metacompass, suppressing of course the electric glare within my vessel, till I awoke from a short siesta about 19h. (7 ) The Earth at this time occupied on the sphere of view a space—defined at first only by the absence of stars—about thirty times greater than the disc of the Moon as seen through a tube; but, being dark, scarcely seemed larger to the eye than the full Moon when on the horizon. But a new method of defining its disc was presently afforded me. I was, in fact, when looking through the lower window, in the same position as regards the Earth as would be an inhabitant of the lunar hemisphere turned towards her, having no external atmosphere interposed between us, but being at about two-thirds of the lunar distance. And as, during an eclipse, the Lunarian would see round the Earth a halo created by the refraction of the Sun's rays in the terrestrial atmosphere—a halo bright enough on most occasions so to illuminate the Moon as to render her visible to us—so to my eyes the Earth was surrounded by a halo somewhat resembling