little adjustment of the helm, the stars remained stationary in the
mirror of the metacompass, showing that I had escaped from the
influence of the Earth's rotation. It was of course impossible to
measure the distance traversed during the invisibility of the Earth,
but I reckoned that I had made above 500 miles between 1h. and 2h.
A.M., and that at 4h. I was not less than 4800 miles from the surface.
With this inference the indication of my barycrite substantially
agreed. The latter instrument consisted of a spring whose deflection
by a given weight upon the equator had been very carefully tested.
Gravity diminishing as the square of the distance from the centre, it
was obvious that at about 8000 miles--or 4000 above the Earth's
surface--this spring would be deflected only one quarter as much by a
given weight as on Earth: at 16,000 miles from the surface, or 20,000
from the centre, one-twenty-fifth as much, and so on. I had graduated
the scale accordingly, and it indicated at present a distance somewhat
less than 9000 miles from the centre. Having adjusted the helm and set
the alarum to wake me in six hours, I lay down upon my bed.

The anxiety and peril of my position had disturbed me very little
whilst I was actively engaged either in steering and manipulating my
machinery, or in looking upon the marvellous and novel spectacles
presented to my eyes; but it now oppressed me in my sleep, and caused
me frequently to wake from dreams of a hideous character. Two or three
times, on such awaking, I went to examine the metacompass, and on one
occasion found it necessary slightly to readjust the helm; the stars
by which I steered having moved some second or two to the right of
their proper position.

On rising, I completed the circuit which filled my vessel with
brilliant light emitted from an electric lamp at the upper part of the