"So the party is broken up," said Harry's nurse, who came to look after her charge. "Yes; one of the audience has flown," said Harry, laughing. "And I must fly, too," said Mary, as she kissed Harry lovingly. "And I shall tell you about the rest of Giant Sun's family to-morrow. Good-by." STORY OF JUPITER AND HIS MOONS. It was several days before Mary could see Harry again and tell him "sky-stories," as he called them, for he had been suffering much pain. Even her gentle voice irritated him, and perfect quiet was ordered by the doctor until the little sufferer was better. At last he was able to enjoy the sunlight and the flowers and the song of the birds again, and one bright morning he was all ready, as he told his sister, to take another trip to Starland. As Mary arranged the pillows on the couch for him, and a large sunshade, so that the glare of sunlight would not hurt his eyes, he caught hold of her hand and, pressing it lovingly, he said: "Darling, what should I do without you? You are so good to me." "How can I help it, little sweetheart!" said Mary, as she turned her head aside to keep him from seeing the tears that would come to her eyes; "how can I help it, when I love you so dearly. Besides, you are my own dear little brother, and you don't know how I missed you all last week." "Did you really, sister? And I was dreaming away all day long about the wonderful stories you have been telling me. I played football on Mars, and had beautiful wings when I lived on the baby planets, and flew from one to another, and now I want to know something about the giant planets. You said they lived next door to the little tiny planets." STORY OF JUPITER. "Yes, next door to the baby planets we come to the largest of all, the giant planet Jupiter. If a tunnel were made through the center of Jupiter, eleven globes as large as the earth, placed side by side, would reach from one side to the other. You could make thirteen hundred globes out of planet Jupiter as large as the earth. If the earth were a large snowball, and a giant could roll thirteen hundred such snowballs into one, he would have a ball to play with as large as planet Jupiter. If it were made of the same material as the earth, it would be more than three hundred times as heavy." "It would take a very big giant to play with that snowball, wouldn't it?" said Harry, smiling at the thought. "There would not be much room in the sky for him to play in, would there?" [Illustration: GIANT JUPITER AND THE EARTH.] "Plenty of room," replied his sister, laughing; "room for millions and millions of balls as large as Jupiter, and much, much larger." "What a wonderful place the sky must be!" said Harry, in awe. "Now, tell me some more about Jupiter. Didn't you tell me last week that he is hidden away among blankets, and very, very hot?"