Chapter 4

CHAPTER IV

REPLY FROM THE OBSERVATORY OF CAMBRIDGE

Barbicane, however, lost not one moment amid all the enthusiasm
of which he had become the object. His first care was to
reassemble his colleagues in the board-room of the Gun Club.
There, after some discussion, it was agreed to consult the
astronomers regarding the astronomical part of the enterprise.
Their reply once ascertained, they could then discuss the
mechanical means, and nothing should be wanting to ensure the
success of this great experiment.

A note couched in precise terms, containing special
interrogatories, was then drawn up and addressed to the
Observatory of Cambridge in Massachusetts. This city, where the
first university of the United States was founded, is justly
celebrated for its astronomical staff. There are to be found
assembled all the most eminent men of science. Here is to be
seen at work that powerful telescope which enabled Bond to
resolve the nebula of Andromeda, and Clarke to discover the
satellite of Sirius. This celebrated institution fully justified
on all points the confidence reposed in it by the Gun Club.
So, after two days, the reply so impatiently awaited was placed
in the hands of President Barbicane.

It was couched in the following terms:

_The Director of the Cambridge Observatory to the President
of the Gun Club at Baltimore._

CAMBRIDGE, October 7.
On the receipt of your favor of the 6th instant, addressed to
the Observatory of Cambridge in the name of the members of the
Baltimore Gun Club, our staff was immediately called together,
and it was judged expedient to reply as follows:

The questions which have been proposed to it are these--

"1. Is it possible to transmit a projectile up to the moon?

"2. What is the exact distance which separates the earth from
its satellite?

"3. What will be the period of transit of the projectile when
endowed with sufficient initial velocity? and, consequently, at
what moment ought it to be discharged in order that it may touch
the moon at a particular point?

"4. At what precise moment will the moon present herself in the
most favorable position to be reached by the projectile?

"5. What point in the heavens ought the cannon to be aimed at
which is intended to discharge the projectile?

"6. What place will the moon occupy in the heavens at the moment
of the projectile's departure?"

Regarding the _first_ question, "Is it possible to transmit a
projectile up to the moon?"

_Answer._-- Yes; provided it possess an initial velocity of
1,200 yards per second; calculations prove that to be sufficient.
In proportion as we recede from the earth the action of gravitation