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 leave me behind. The apergy had to make up for this, as well as to carry me some forty millions of miles in a direction at right angles to the former—right outward towards the orbit of Mars. Again, I should share the motion of that particular spot of the Earth's surface from which I rose around her axis, a motion varying with the latitude, greatest at the equator, nothing at the pole. This would whirl me round and round the Earth at the rate of a thousand miles an hour; of this I must, of course, get rid as soon as possible. And when I should be rid of it, I meant to start at first right upward; that is, straight away from the Sun and in the plane of the ecliptic, which is not very different from that in which Mars also moves. Therefore I should begin my effective ascent from a point of the Earth as far as possible from the Sun; that is, on the midnight meridian.

For the same reason which led me to start so long before the date of the opposition, I resolved, having regard to the action of the Earth's rotation on her axis, to start some hours before midnight. Taking leave, then, of the two friends who had thus far assisted me, I entered the Astronaut on the 1st August, about 4.30

After sealing up the entrance-window, and ascertaining carefully that everything was in order—a task which occupied me about an hour—I set the generator to work; and when I had ascertained that the apergion was full, and that the force was supplied at the required rate, I directed the whole at first into the main conductor. After doing this I turned towards the lower window on the west—or, as it was then, the right-hand side—and