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FOR PRACTICAL MEN:

CONTAINING

EXPLANATIONS OF

THE PRINCIPLES OF MECHANICS;

THE STEAM ENGINE,

WITH ITS VARIOUS PROPORTIONS;

PARALLEL MOTION,

THE PRINCIPLES OF WHICH ARE FULLY AND CLEARLY INVESTIGATED, WITH
PRACTICAL RULES, ADAPTED TO THE COMMONEST CAPACITY;

TABLES OF SAFETY-VALVE LEVERS;
TABLES OF PARALLEL MOTIONS;

TABLES OF THE WEIGHT OF CAST IRON PIPES;
Tables of various Kinds, on Cast and Wrought Iron, for
the Use of Founders, Smiths, &c.;

Strength and Stress of Materials ;
CENTRES OF GRAVITY, GYRATION, &c.;
CENTRAL FORCES,

With their Application to the Theory of Fly Wheels, &c.;
HYDROSTATICS, AND HYDRAULICS.
WITH A SHORT DISSERTATION ON RAIL-ROADS, &c.

BY

JAMES HANN, TEACHER OF MATHEMATICS,

AND

ISAAC DODDS, CIVIL ENGINEER.

The labour spent on books or arts

Is both a waste of time and parts,

If not directed to that end

On which man's worth and weal depend.

Newcastle upon Tyne:

PRINTED FOR THE AUTHORS BY MACKENZIE AND DENT,

PILGRIM STREET.

BODLEIAN

$7.12 1900

LIBRARY

ΤΟ

THE RIGHT HONOURABLE

HENRY

LORD BROUGHAM AND VAUX,

LORD HIGH CHANCELLOR

OF

Great Britain.

WE beg Leave to inscribe this little Work to your Lordship, as a humble Tribute of Gratitude for your able, determined, and persevering Efforts, both to promote the Education and to ameliorate the Condition of your Fellow Men; and that your Lordship may long live to enjoy that Happiness and Peace of Mind which ever attend a Life spent in the Advancement of Science and the Improvement of our Species, is the ardent and sincere Wish of

THE AUTHORS.

Heworth Shore,
January 12, 1833.

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