"You only have to learn one syllable," said Nita. "They all end in ometer. It's convenient that they're named like that."

Davis smiled.

"I never thought of that before, but it is convenient."

"But how do you balance the plane?" Nita demanded.

"In straightaway flight it balances itself," Davis explained. "It's one of the new inherently stable designs. For turning, the wing tips work automatically. We've a gyroscopic affair that attends to them."

Nita subsided for a moment, then demanded further information.

"What's that lever for? To change speeds?"

Davis laughed.

"Well, no. We haven't but one speed forward and no reverse——"

"You're making fun of me!"