But how will you get inside?"

There was a similar problem about a dumpling."

Yes, I know. But how?"

That's perfectly easy. An air-tight manhole is all that is needed. That,

of course, will have to be a little complicated; there will have to be a

valve, so that things may be thrown out, if necessary, without much loss

of air."

"Like Jules Verne's thing in A Trip to the Moon."

But Cavor was not a reader of fiction.

"I begin to see," I said slowly. "And you could get in and screw yourself

up while the Cavorite was warm, and as soon as it cooled it would become

impervious to gravitation, and off you would fly--"

"At a tangent."

"You would go off in a straight line--" I stopped abruptly. "What is to

prevent the thing travelling in a straight line into space for ever?" I

asked. "You're not safe to get anywhere, and if you do--how will you get

back?"

The First Men In The Moon