"Oh, you know, Joe!" said Jack. "The sun always sets in the west and rises in the east."
"But how can it go down on one side of the world and come up on the other?" asked Joe.
"Because the earth whirls around every twenty-four hours," said Jack. "In the morning our side of the earth is whirling toward the sun, and in the afternoon we are whirling away from it."
"Oh, dear! Are we whirling now?" cried Joe. "I thought the world was standing still. I thought it was the sun that was going around."
"The sun is going around, Joe, but so are we. Father says that our world is whirling faster right now than the fastest automobile can race," said Jack.
"My!" said Joe. "Is that what makes the wind blow so hard up here? Hold on, or we shall be blown off!"
"Just look at those cows!" shouted Jack. "They are being milked. Let's go and watch."
Then away the boys raced to a group of big, brown cows that were being milked not far away. Great pails full of the rich, creamy milk were carried into a little house near by.
She filled two tall mugs with warm milk and piled a plate with gingerbread cakes, and set before them