Even the helmet, that covered him with its invisibility, had vanished!
I could not operate the mechanism of invisibility of De Boer's X-flyer.
But the mechanism controlling the asteroid's invisibility was not destroyed.
When he had time to think, the invisibility of the thing was not so incredible.
It would imply the invisibility of a tangible substance; of a solid.
But a certain part of the invisibility machine did not enter his plans.
A solid, living person, undisguised by any cloak of invisibility.
Arcot snapped off the drive and turned on the invisibility apparatus.
Arcot snapped the ship into invisibility and darted to one side.
If he was inside the train, it seemed that he must have the trick of invisibility to escape.