true. But what in the world is an air glider, Tom?"
"It's the last word in aeroplanes. You don't need a motor to make it go."
"Don't need a motor?"
"No, the wind does it all. It's a sort of aeroplane, but the motion comes from the wind, acting on different planes, and this is accomplished by shifting weights. In it you can stand still in a fierce gale, if you like."
"How, by tying her fast on the ground?"
"No, hovering in the air. It's all done by getting the proper balance. The harder the wind blows the better the air glider works, and that's why I think it will be just the thing for Siberia. I'm going to get right at work on it, and you'll help me; won't you?"
"I sure will. Say, is platinum worth much?"
"Worth much? I should say it was! It's got gold beat now, and the available supply is very small, and it's getting more scarce. Russia has several mines, and the metal is of good quality. I've used some Russian platinum, but the kind Mr, Petrof sky gave me to-day was better than the best I ever had. If we can only find that lost mine we'll be millionaires all right."
"That's what we thought when we found the
