fluttered. At command from Dick they cranked the motor and started it on its way.

“This is the porch,” Dick said. “Just imagine we’re all that future farmer sitting in the shade and reading the morning paper while the manless, horseless plowing goes on.”

Alone, unguided, the drum on the head of the pole in the center winding up the cable, the tractor, at the circumference permitted by the cable, turned a single furrow as it described a circle, or, rather, an inward trending spiral about the field.

“No horse, no driver, no plowman, nothing but the farmer to crank the tractor and start it on its way,” Dick exulted, as the uncanny mechanism turned up the brown soil and continued unguided, ever spiraling toward the field’s