Jack nodded. He was curious, as was Tom, to know the Professor's plan. They did not have long to wait.
"I wish you would get the machine ready to install a radio-telephone outfit in its place. In that way I can gauge the limits of my invention without attracting undue attention, as everybody in this vicinity has seen you in flight and would imagine that you were merely taking a trip through the air."
"But can you get out an apparatus light enough for us to take up?" asked Jack.
"I am working on that now," said Mr. Chadwick. "I'll have it ready in a week."
"We'll be ready for you," promised Jack.
CHAPTER VII.
THE GREAT TEST.
A week later to the day on a sunshiny, windless morning, the Wondership was run out of its shed, glistening with new paint and with every bit of bright work burnished till it shone and sparkled like newly-minted silver. Amidships on the craft, the general construction of which is familiar to readers of foregoing volumes of this series, was a square metal box with small wires leading to long copper wires stretched from end to end of the Wondership's body.