his "Sun of the wolves" played a part; they recalled
the influence which the ignorance of past ages had ascribed to her; they
sang about her in every tone; a little more and they would have quoted
her witty sayings; the whole of America was filled with selenomania.

The scientific journals treated the question which touched upon the
enterprise of the Gun Club more specially; they published the letter
from the Observatory of Cambridge, they commented upon it and approved
of it without reserve.

In short, even the most ignorant Yankee was no longer allowed to be
ignorant of a single fact relative to his satellite, nor, to the oldest
women amongst them, to have any superstitions about her left. Science
flooded them; it penetrated into their eyes and ears; it was impossible
to be an ass--in astronomy.

Until then many people did not know how the distance between the earth
and the moon had been calculated. This fact was taken advantage of to
explain to them that it was done by measuring the parallax of the moon.
If the word "parallax" seemed new to them, they were told it was the
angle formed by two straight lines drawn from either extremity of the
earth's radius to the moon. If they were in doubt about the perfection
of this method, it was immediately proved to them that not only was the
mean distance 234,347 miles, but that astronomers were right to within
seventy miles.

To those who were not familiar with the movements of the moon, the
newspapers demonstrated daily that she possesses two distinct movements,
the first being that of rotation upon her axis, the second that of
revolution round the earth, accomplishing both in the same time--that is
to say, in 27-1/3 days.

The movement of rotation is the one that causes night and day on the
surface of the moon, only there is but one day and one night in a lunar
month, and they each last 354-1/3 hours. But, happily, the face, turned
towards the terrestrial globe, is lighted by it with an intensity equal
to the light of fourteen moons. As to the other face, the one always
invisible, it has naturally 354 hours of absolute night, tempered only
by "the pale light that falls from the stars." This phenomenon is due
solely to the peculiarity that the movements of rotation and revolution
are accomplished in rigorously equal periods, a phenomenon which,
according to Cassini and Herschel, is common to the satellites of
Jupiter, and, very probably to the other satellites.

Some w