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PRINTED, WITH A FEW VARIATIONS, AND ADDITIONAL
REFERENCES, FROM THE TEXT OF

ROBERT SIMSON, M.D.

EMERITUS rROFESSOR OF MATHEMATICS IN THE UNIVERSITY
OF OXFORD.

CAREFULLY CORRECTED

BY SAMUEL MAYNARD.

LONDON:

PRINTED FOR LONGMAN, ORME, BROWN, GREEN, AND LONGMANS;
T. CADELL; J. RICHARDSON; J. M. RICHARDSON ; BALDWIN AND
CRADOCK; J. G. AND F. RIVINGTON; E. WILLIAMS; HAMILTON, ADAMS,
AND CO.; WHITTAKER AND CO.; SHERWOOD AND CO.; DARTON AND
HARVEY SIMPKIN AND MARSHALL; J. SOUTER; SMITH, ELDER, AND
Co.; B. FELLOWES: AND J. AND J. J. DEIGHTON, CAMBRIDGE.

1838.

LONDON:

Printed by A. SPOTTISWOODE,

New-Street-Square.

QA451

ES

1838

EDITOR'S PREFACE.

In preparing this edition of Euclid for the press, the Editor has scrupulously adhered to the text of Dr. Simson, at least with one exception, where adeparture from it will, by all geometers, be admitted to be not only justifiable, but absolutely necessary. The first Proposition of Book III. has been long known to be imperfectly demonstrated; and, as the defect may be supplied by the addition of but two or three lines to the original text, the Editor has not hesitated to introduce the amendment. This may be regarded as by far the principal departure that has been made from the text of the Quarto Edition of 1756, &c. The present, however, will be found to differ considerably from the preceding 12mo Edition (1832), which abounds with errors in the marginal references; these have all been corrected, and many new and needful references added. From these circumstances, and from the care which has been bestowed on the proofs as the work passed through the press, it is expected that no error or omission of any consequence will appear in the present impression.

SAMUEL MAYNARD.

No. 8. Earl's Court, Leicester Square,

JUL 3

HERTZ

London, Sept. 2. 1834.

294989

2929

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