The room in which Frank’s invention stood was a vast apartment, with sliding doors in the roof which could be operated to permit the exit of his flying machines from the interior.

In the middle of this room stood the flying ice ship.

The vessel was made of an extremely light, bullet-proof material called aluminum, and looked like a two-masted schooner, with a rounded, wedge-shaped bow and stern.

At the truck of each mast was a large gyroscope, while upon the upper part of each of the yards many more of these wheels were arranged in a horizontal position to lift the engine in the air.

Upon the yards and stays were furled sails, to be used while traveling before the wind.

At the bow was a long bowsprit, a searchlight at its foot, and upon its deck, in the forward section, a pilot-house.