I had, moreover, to lose 500 miles of the
eastward drift during the last hour in which I should be subject to
it, through the action of the apergic force above-mentioned. Now, an
elevation of 330 miles would give the Astronaut an orbit on which 90 deg.
would represent 6500 miles. In seven hours I should be carried along
that orbit 7000 miles eastward by the impulse my Astronaut had
received from the Earth, and driven back 500 miles by the apergy; so
that at 1 A.M. by my chronometer I should be exactly in the plane of
the midnight meridian, or 6500 miles east of my starting-point in
space, provided that I put the eastward apergic current in action
exactly at 12 P.M. by the chronometer. At 1 A.M. also I should have
generated a westward impulse of 1000 miles an hour. This, once
created, would continue to exist though the force that created it were
cut off, and would exactly counterbalance the opposite rotation
impulse derived from the Earth; so that thenceforward I should be
entirely free from the influence of the latter, though still sharing
that motion of the Earth through space at the rate of nearly nineteen
miles per second, which would carry me towards the line joining at the
moment of opposition her centre with that of Mars.
Pages:
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63