.

TREATISE

Four new and very concife Methods to determine the Areas of
Right-lined Figures Arithmetically, or by Calculation, as
well as the Geometrical ones heretofore treated of;
with two other new Geometrical Methods much
more accurate and ready than any of the
former, never before made public.

ALSO,

The Method of Tracing Defaced Mearings from the
Down, or any other, Survey,

Very useful to Perfons who have any Property in
Land, to Lawyers in controverted Surveys,
and to Practical Surveyors.

The whole illuftrated with Copper-plates.

THE FIFTH EDITION.

By ROBERT

GIBSON,

Teacher of the Mathematics.

DUBLIN:

PRINTED BY P. WOGAN, No. 23, OLD-BRIDGE.

1795.

:

ΤΟ

THE RIGHT HONOURABLE

THOMAS CARTER, Efq;

MASTER OF THE ROLLS, &c. &c.

SIR,

T

HE great Knowledge You have acquired in all Kinds of Polite Literature, and the Encouragement You constantly give for the Propagation of them in general, but more particularly to the Mathematical Sciences, are Motives fufficient to direct me to dedicate this Work

to you.

your

PANEGYRIC, SIR, is not my Province, and if it were, I know I must offend one of extensive Learning, fhould I attempt to difplay it on this Oc cafion Yet I muft fay, that if but one fourth Part of the Nobility and Gentle

men of opulent Fortunes in this Kingdom, were of your unlimited generous Difpofition in encouraging Arts and Sciences, we might in a few Years be able to vie with any Country whatsoever.

THAT you may long enjoy an uninterrupted State of good Health is the Wish of moft; but of none more particularly,

than of,

SIR,

Your most obliged,

moft obedient,

and most affured

Humble Servant,

ROBERT GIBSON.