down. And directly it had cooled and the manufacture was completed all that uproar happened, nothing above it weighed anything, the air went squirting up, the house squirted up, and if the stuff itself hadn't squirted up too, I don't know what would have happened! But suppose the substance is loose, and quite free to go up?"
"It will go up at once!"
"Exactly. With no more disturbance than firing a big gun."
"But what good will that do?"
"I'm going up with it!"
I put down my teacup and stared at him.
"Imagine a sphere," he explained, "large enough to hold two people and their luggage. It will be made of steel lined with thick glass; it will contain a proper store of solidified air, concentrated food, water distilling apparatus, and so forth. And enamelled, as it were, on the outer steel———"
"Cavorite?"
"Yes."
"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 man-
