"You will notice," the Wizard was pointing out briskly, "that I have done away with all controls and levers. On this board are all the buttons necessary to operate the ship."

"Looks like an organ," observed Dorothy, squinting at the bright array of buttons set in the top of the table within easy reach of the first seat. "Must you play all those stops and starters to guide the plane?"

"Not quite all," smiled the Wizard, "but if we wished to start, I'd first press this green button to depress the wings and inflate our balloon. Next, I'd push the button marked 'up' and, if I decided to go North, this 'North' button, as well. Then I'd use the wheel to hold her steady, and if I preferred to go up in a gradual way, I'd push this button marked 'zig.'"

"And I suppose if you saw something interesting, or wished to dodge a mountain, you'd 'zag,'" suggested the Scarecrow, indicating the "zag" button with his pudgy finger. "Or you could 'spin,' 'spiral' or 'level-off'—"

"Stop! Stop!" panted the Cowardly Lion, clapping his paw to one eye, "all this up-zig and down-zig makes me positively giddy!"

"It does seem a little complicated," said Dorothy, looking dubiously at the Wizard's button-board.

"Why, it's perfectly simple!" the Wizard assured her brightly. "All you have to do is touch the right buttons at the right time!"

"But—"

The Scarecrow, who had been about t