get away to school myself soon. Say, what kind of a traveling caravan is this, anyway?"
"I'll show you," said Ned promptly, and as both got to the ground he touched a bolt and the back of the wagon came down, forming steps. Reaching in he moved a bracket, and a section of the side of the wagon slid back, letting light into the vehicle. Frank noticed a sort of a bench, a lathe, and some small pieces of machinery.
Ned Foreman got up the steps and touched something. There was a click and a spark of light. He pulled a wheel around and then there was a chug-chug-chug.
"Now, what's that?" asked the curious Frank.
"It's a little gasoline motor," explained Ned. "Step in and see what a famous tinkering shop on wheels we've got."
"Why, this is just grand!" declared Frank, as he glanced around the interior of the wagon in an admiring way.
"Yes, it's clean, attractive and made up to date," said Ned. "The man who owns these outfits is working up some good routes. If you have anything to sharpen, now, I'll show you the kind of work we do."
Frank whipped out his pocket knife in a jiffy. Ned touched a lever near the motor, and things went whirring. There was a busy hum that made
