"Yes, my dear, coming," said the professor, and shouldering his bag
of specimens he shook hands with the boys and hastened off to answer
his sister's dictatorial call.

"I guess we'd better be going," said Jack, with a smile that he could
not repress.

The others agreed, and they were soon speeding back to High Towers, as
the estate of Jack's father, also a noted inventor, was called, with
plenty to talk about as a result of the events of the day.




CHAPTER V.

CHESTER CHADWICK--INVENTOR.


As readers of the preceding volumes of this series, know, Jack
Chadwick and Tom Jesson, his cousin, had won the titles of Boy
Inventors through their ingenuity and mechanical genius. Jack'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 fortune and was able to maintain
a fine estate, already referred to as High Towers where, with
splendidly equipped workshops and a miniature lake, he could
experiment and work out his ideas.

In the first book of this series it was related how Tom Jesson, Jack's