!

INTENDED FOR THE

INSTRUCTION AND ENTERTAINMENT

OF

YOUNG PEOPLE:

IN WHICH

THE FIRST PRINCIPLES

OF

'ATURAL AND EXPERIMENTAL PHILOSOPHY

ARE FULLY EXPLAINED.

VOL. I. OF MECHANICS AND ASTRONOMY.

"Conversation, with the habit of explaining the meaning of words and the structure of common domestic implements to children, is the sure and effectual method of preparing the mind for the acquirement of science."

Edgeworth's Practical Education.

BY THE REV. J. JOYCE.

A NEW EDITION, CORRECTED AND IMPROVED.

PHILADELPHIA:

BLISHED BY MAROT & WALTER, ANTHONY FINLEY, BENNETT & WALTON, BENJAMIN & THOMAS KITE, H. C. CAREY & I. LEA, M'CARTY & DAVIS, KIMBER & SHARP LESS, AND LYDIA R. BAILEY.

Lydia R. Bailey, Printer.