cracked, and crumbling away, but I could read the words, 'The sun guides
me, the shadow you.' The rod, or gnomon, as it is sometimes called,
stood just halfway between the ends. Where would the noon shadow fall,
Susie?"

[Illustration]

"In the middle, wouldn't it?" answered Susie.

"And the morning shadow would fall on the west and the evening shadow on
the east side," said Frank.

"Now we'll put in the shadow stick," said Uncle Robert, drawing a
triangle on the paper.

"Why don't you make it stand up straight?" asked Donald.

"The shadow does not tell the truth," said Uncle Robert, "unless it
points in the same way that the north pole does, and that, we know,
points to the north star. I will explain this some other time."

"Couldn't we make a sun dial?" asked Donald. "I don't believe it would
be very hard."

"You could make one easily," answered Uncle Robert.

"But let's have the shadow stick first," said Frank.

Susie went to the window and looked out at the clear star-lighted sky.