"Sure—watch me!" and Don opened the valve that sent steam into the feeder. He pulled a lever at the left and immediately a great vibration started as the travelling crane, or arm, swung about their heads and tossed the steel cables about in the air.
"Hi, that's the way, all right!" laughed Don, at his successful experiment.
Dot saw the cables with the grappling hooks swing over her head and dodged down inside the caboose.
"You go over to the trees and play you're a timber-jack. I'm the engineer that runs Jumpin' Jane," ordered Don.
Dot jumped down and ran over to the place where several small pine trees lay parallel upon the ground. Don started the lever and watched the travelling crane swing around on the opposite side of the skidder from that where Dot waited to hook up the grapplers.
"Humph! guess I pushed on the wrong side of the board," murmured Don, as he pushed the other lever over on the right hand side.
He forgot to pull the first one back in place so the arm swung over to the right and back again to the left, then reversed until its cables with grappling hooks were swinging back and forth dangerously near to the children's head.
Dot screamed: "Turn her off, for goodness sake! Those hooks'll tear us to pieces!"
Don was nervous over the error and wondered why they acted that way. Suddenly, he saw that he had not turned off the first lever. As soon as they were both shut off the arm remained where it was, and the cables gradually stopped swinging.