"That's great," said Tom. "I knew he was getting along all right. I was too busy to go with you so I called Doctor Chilton. He told me that the X-ray showed no broken bones, but our friend must remain under observation for a few days more."
"You've changed the wiring on the disk, haven't you?" asked Ned, who knew a little about electricity.
"I Want to Try Alternating Current."
"I want to try alternating current instead of direct and see if doing so won't improve it. Dad suggested that. What is it, Koku?"
"Boy bringum letter for Master. Say must put name on book." The man held out an envelope and pad.
"It's a radiogram. Sign for me, Ned, will you?"
Tom ripped open the envelope and glanced over the message.
"Bad news?" asked his chum, seeing a changed expression on the inventor's face.
