golf-links, for there would be plenty
of room to send the ball flying!"

"Undoubtedly," I answered, "you would have plenty of space for that; and
I can tell you that you would be able to send the ball flying six times
as far as you could on the earth with the same expenditure of force,
because the moon's gravitation is only one-sixth of that of the earth."

"That would be grand," said M'Allister. "I should like to have a few
turns at golf on the moon."

"Ah, but you would also have extra long tramps after your ball," I told
him, "so you would get plenty of exercise; but, for the reason already
mentioned, you would be able to get over the ground six times as
easily."

"Well, Professor, I should not mind the distance in those
circumstances," he answered jauntily.

"Perhaps you like jumping exercise too," I said. "Only fancy,
M'Allister, if you wanted to jump across one of those narrower cracks!
Why, if you could jump a distance of ten feet on the earth, you could
jump sixty feet on the moon just as easily! Some of our athletes have
jumped a length of twenty-six feet, so the same persons could with equal
ease jump 156 feet on the moon! What do you think of that for a long
jump?"

"Heh, Professor," he replied, looking rather bewildered, "what a jump!
Why, I should think the mon was never coming down again!"

"I say, though, M'Allister, after all I am inclined to think you would
not find golf on the moon altogether a pleasant game," said John.

"Why not, mon?" inquired M'Allister.

"Well," answered John, "I was thinking that if you sent your ball flying
into one of those cracks which are several miles deep you would find
yourself eternally 'bunkered,' for no niblick ever made would get you
out of that."

M'Allister laughed so heartily at this idea of John's that we both
joined in his mirth; then I recommended him to wait until we reached
Mars if he wished to enjoy a game of golf, for there he would be sure to
find enormous stretches of level ground.

[Illustration: _From a coloured drawing by M. Wicks_ Plate III

CHART OF THE MOON, SHOWING THE PRINCIPAL FORMATIONS SEEN ON ITS SURFACE

The dark areas are termed seas, though there is no water on the moon.
The many small rings are ring-mountains and ring-plains. (The North Pole
is at the top.)]

[Illustration: Plate IV

INDEX MAP TO CHART OF THE MOON

1. Bay of Rainbows

2. Plato

3. Sea of Cold

4. Alps Mountains

5. Great Alpine Valley

6.