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ON

THE STRENGTH OF

TIMBER,

CAST AND MALLEABLE IRON,

AND OTHER MATERIALS:

WITH RULES FOR APPLICATION IN ARCHITECTURE, ·
THE CONSTRUCTION OF SUSPENSION BRIDGES, RAILWAYS, &c.;

AND

AN APPENDIX ON THE POWER OF LOCOMOTIVE ENGINES,
AND THE EFFECT OF INCLINED PLANES AND GRADIENTS.

WITH SEVEN PLATES.

BY PETER BARLOW, F.R.S.

MEM. INST. OF FRANCE; OF THE IMP. AND ROYAL ACADEMIES OF PETERSBURG AND
BRUSSELS; OF THE AMER. SOC. ARTS; AND HON. MEM. INST, CIVIL ENGINEERS.

A New Edition,

REVISED AND CORRECTED BY I. F. HEATHER, M. A.

OF THE ROYAL MILITARY ACADEMY, WOOLWICH.

TO WHICH IS ADDED

AN ESSAY ON THE EFFECTS PRODUCED BY CAUSING WEIGHTS
TO TRAVEL OVER ELASTIC BARS.

BY THE REV. ROBERT WILLIS, M.A., F.R.S.

JACKSONIAN PROFESSOR OF NATURAL AND EXPERIMENTAL PHILOSOPHY IN THE
UNIVERSITY OF CAMBRIDGE.

WITH NINE ILLUSTRATIONS.

LONDON:

JOHN WEALE, 59, HIGH HOLBORN.

M.DCCC. LI.

HUGHES, PRINTER,

KING'S HEAD COURT, GOUGH SQUARE.

ΤΟ

THE REV. ROBERT WILLIS,

M.A., F.R.S.

JACKSONIAN PROFESSOR IN THE UNIVERSITY OF CAMBRIDGE,

This Edition of

PROFESSOR BARLOW'S WORK

IS RESPECTFULLY DEDICATED

BY HIS OBEDIENT SERVANT,

THE PUBLISHER.

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