In one of the flier's facets was the round screw-door, admitting one through a small vestibule-chamber, and then through a second hermetically-sealing door into the flier's interior. In that interior, all the flier's mechanisms and equipment had been attached directly to the inner side of its great crystal-like ball, with hexagonal windows, made double and of thick unbreakable glass, here and there in the walls, between the mechanisms. Just inside one of those large windows, at what might be called the ball-like flier's front, were ranged on a black panel of several feet in length the space-flier's controls. The most central of these controls were six gleaming-handled levers which controlled the flier's great force-rays, shooting them forth from any one of the six ray-openings in its sides, to send the flier hurtling through space by reaction, or to use against asteroids or other objects as a great weapon. Supported from the wall in front of those levers was a metal chair that swung on pivots and on sliding pneumatic shock-absorbing tubes, a metal strap across it to hold its occupant in it. And the occupant of that chair, with the six force-ray controls before him, thus controlled the flier's flight through space, and could, if necessary, use its great rays as weapons. To the left of those controls were the recording dials and switches of the four great generators. Those four gleaming cubical generators themselves were attached to the other side of the flier's hollow interior, along with the marvelously compact and powerful Newson-Canetti batteries. Operating from those batteries whose power-stores were almost exhaustless, the generators, when turned on, would generate the great force-vibrations which, of a wavelength higher than that of light vibrations, exerted a terrific pressure or force beside which the pressure of light was as nothing. These vibrations were carried by thick black cables running between the flier's double walls to the projecting-mechanisms inside the six ray-openings, and from those openings the great force-vibrations were released as great force-rays by the operator of the flier's six controls. These great force-rays, we had found, almost equalled the speed of light itself in the velocity with which they shot out from the flier's ray-openings.