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THE

MODERN MECHANIC:

A

SCIENTIFIC GUIDE AND CALCULATOR

COMPRISING

RULES AND TABLES IN THE VARIOUS
DEPARTMENTS OF MECHANICAL

SKILL AND LABOR.

BY WILLIAM GRIER,

CIVIL ENGINEER.

How have we obtained this great superiority over these poor savages? Because
Science has been at work, for many centuries, to diminish the amount of our
mental labor, by teaching us the easiest mode of calculation.

RESULTS OF MACHINERY

BOS TON:
BRAD LEY, DAYTON, & CO.,

No. 20 WASHINGTON STREET.

1861.

HARVARD UNIVERSITY LIBRARY

94 *104

CONTENTS.

Air pump..

Bramah's press

.. 137

Eccentric.....

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