CHAPTER IV

Monarch of the Air Their hearts beating high, the boys looked, enthralled at the magnificent spectacle. The great airship sailed on serenely, moving at terrific speed, and yet at such a height that it scarcely seemed to be more than floating. “How fast do you think she’s going?” asked Teddy. “Oh, about seventy miles an hour,” replied Don. “That’s about her regular speed. But when they want to let her out she can make a hundred or more.” “Why, that’s faster than the lightning express!” exclaimed Teddy. “A train isn’…