for interest and constant, it would cost the farmer seventy dollars a year. What ten-acre farmer, on two- hundred-dollar land, who keeps books, can keep a horse for seventy dollars a year? And on top of that, it would save him, in labor, personal or hired, at the abjectest minimum, two hundred dollars a year.”

“But what guides it?” Rita asked.

“The drum on the post. The drum is graduated for the complete radius — which took some tall figuring, I assure you — and the cable, winding around the drum and shortening, draws the tractor in toward the center.”

“There are lots of objections to its general introduction, even among small farmers,” Gulhuss said.

Dick nodded affirmation.