"I don't see how that is," said Donald.

"Let us see if we can find out," said Uncle Robert. "Frank, you stand at
the east end of the room, Donald at the west, and Susie in the middle.
Now, we'll play that Frank is in New York, Susie here at home in
Illinois, and Donald in Denver. I'll take the lamp and be the sun. You
are shadow sticks, you know. Now watch the shadows, and see when they
point directly north."

Uncle Robert took the lamp and walked slowly from the east side of the
room.

"My shadow points north," said Frank as Uncle Robert passed him.

"Now mine does," said Susie.

"And mine last of all," said Donald.

Uncle Robert took out his watch. It was ten minutes past eight.

"That is Susie's time," he said. "Would it be the same in New York,
Frank?"

"I think it would be past that," said Frank, "but I don't know how
much."

"It is ten minutes past nine by the watch in New York," said Uncle
Robert.

"When would it be that time in Denver?" asked Donald.