the projectile will start?'

"Regarding question No. 1, 'Is it possible to send a projectile to the
moon?'

"Yes, it is possible to send a projectile to the moon if it is given an
initial velocity of 1,200 yards a second. Calculations prove that this
speed is sufficient. In proportion to the distance from the earth the
force of gravitation diminishes in an inverse ratio to the square of the
distance--that is to say, that for a distance three times greater that
force is nine times less. In consequence, the weight of the projectile
will decrease rapidly, and will end by being completely annulled at the
moment when the attraction of the moon will be equal to that of the
earth--that is to say, at the 47/52 of the distance. At that moment the
projectile will have no weight at all, and if it clears that point it
will fall on to the moon only by the effect of lunar gravitation. The
theoretic possibility of the experiment is, therefore, quite
demonstrated; as to its success, that depends solely in the power of the
engine employed.

"Regarding question No. 2, 'What is the exact distance that separates
the earth from her satellite?'

"The moon does not describe a circle round the earth, but an ellipse, of
which our earth occupies one of the foci; the consequence is, therefore,
that at certain times it approaches nearer to, and at others recedes
farther from, the earth, or, in astronomical language, it has its apogee
and its perigee. At its apogee the moon is at 247,552 miles from the
earth, and at its perigee at 218,657 miles only, which makes a
difference of 28,895, or more than a ninth of the distance. The perigee