"Come on then, Ned and Mr. Damon. Mr. Petrofsky and Rad can cast off the ropes."

The wind, if anything, was stronger than ever. It was a terrific gale, and just what was needed. But how would the air glider act? That was what Tom wanted very much to know.

"Cast off!" he cried to the Russian and Eradicate, and they slipped the ropes.

The next moment, with a rush and whizzing roar, the air glider shot aloft on the wings of the wind.

CHAPTER IX

THE SPIES

"We're certainly going up!" yelled Ned, as he sat beside Tom in the cabin of the air glider.

"That's right!" agreed the young inventor rather proudly, as he grasped two levers, one of which steered the craft, the other being used to shift the weights. "We're going up. I was pretty sure of that. The next thing is to see if it will remain stationary in the air, and answer the rudder."

"Bless my top knot!" cried Mr. Damon. "You don't mean to tell me you can stand still in a gale of wind, Tom Swift."