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 helm, which occupied but a few minutes some half-dozen times in the twenty-four hours. There was not even the change of night and day, of sun and stars, of cloud or clear sky. Were I to describe the manner in which each day's leisure was spent, I should bore my readers even more than—they will perhaps be surprised by the confession—I was bored myself.

My sleep was of necessity more or less broken. I wished to have eight hours of rest, since, though seven of continuous sleep might well have sufficed me, even if my brain had been less quiet and unexcited during the rest of the twenty-four, it was impossible for me to enjoy that term of unbroken slumber. I therefore decided to divide my sleep into two portions of rather more than four hours each, to be taken as a rule after noon and after midnight; or rather, since noon and midnight had no meaning for me, from 12h. to 16h. and from 24h. to 4h. But of course sleep and everything else, except the necessary management of the machine, must give way to the chances of observation; it would be better to remain awake for forty-eight hours at a stretch than to miss any important phenomenon the period of whose occurrence could be even remotely calculated.

At 8h., I employed for the first time the apparatus which I may call my window telescope, to observe, from a position free from the difficulties inflicted on terrestrial astronomers by the atmosphere, all the celestial objects within my survey. As I had anticipated, the absence of atmospheric disturbance and diffusion of light was of extreme advantage. In the first place, I ascertained by the barycrite and the discometer my