ack's father, Chester Chadwick, was an inventor of note, and unlike the majority of inventors, he had turned his devices to such good account that he had accumulated a substantial fort

and had not been heard from since that time. This volume, which was called the Boy Inventors' Wireless Triumph, told of the boys' exploits in the radio-telegraphic field and the uses to which they were abl

s this volume was entitled, set forth in a graphic way the triumph of the boys over the machinations of a gang of rascal

on the surface and in the depths of the ocean. The way in which the wonderful diving craft aided Uncle Sam in a cri

pwrecked and cast away without an apparent hope of rescue on a yacht belonging to a German scientist, the crew of which had mutinied. The boys' capture by a strange tribe

to develop it. Enemies strove desperately to secure the papers, and even went to the length of forging a will for the purpose, but partly through the agency of an odd German lad, Heiney Pumpernickel Dill, their schemes were frustrated and th

een closeted in his own private laboratory. The boys had seen him only at rare intervals, and then he had

uld be, but had arrived at no satisfactory conclusion when, two days after their experience with the eccentric professor, Mr. Chadwick summoned them to his private workshop. The boys, who had been at wor

ned Jupe, who had a vocabulary that was all his own,

," said Jack, "just as soon as we've

sentable. Then they hurried to Mr. Chadwick's workshop. They found him standing be

re metal box on the table. Attached to this metal box was a sort of horn-shaped mouthpiece something like the transmitter of a

nt for

'm in a quandary. Have you any

shook th

kind of a telepho

hone," replied

ked Jack, glancing about him, "or

l ever be," said Mr. Chadwick with a

Jack suddenly. "It's

flood of questions from the boys, he told them how he had b

oys to go down to that shed that was put up la

put up to store ga

similar to this one. Start the dynamo and then stand in front of the transmitter and place the receiver to your ear. If you don't hear anything at once use the inductor to tune your

telephone is the same as that of

e as I can," said the inventor, "but now I am anxio

ssibility of transmitting actual speech through space, just as the dots and dashes of the wireless telegraph are sped through the ether, quickened their inventive faculties to

ected shed stood, and which, it had been given out, was to serve for the storage of gasoline. Unlocking the

uzz. With shining eyes and throbbing pulses he placed the receiver to his ear as his

om, himself a tipt

aking his head. "I guess the thin

ed Tom. "By the way, how about that tu

ing into solid ivory from the neck up. I

ought the sending and receiving ends into harmony just as if they had been two musical instruments. When the right electric "chord" was struc

workshop and the small shed a human voice had been borne on electric waves. Sharp and clear as

l-l