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A

T RE A TI SE

William

Should
Mis

Practical Surveying; Boch
May

1. 10

WHICH IS DEMONSTRATED

to

FROM ITS FIRST PRINCIPLES

WHEREIN

EVERY THING THAT IS USEFUL AND CURIOUS
IN THAT ART IS FULLY CONSIDERED AND

EXPLAINED;

PARTICULARLY,
Four new and very concise 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 Persons who have any Property in
Land, to Lawyers in controverted Surveys,

and to Practical Surveyors.
The whole illustrated with Copper-plates.

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By

R O B E R T GIBSON,

Teacher of the Mathematics.

DU B L I N:

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

1795.

:

و .

TO

THE RIGHT HONOURABLE

THOMAS CARTER, Efq;

Master of the ROLLS, &c. &c.

6 I R,

The great knowledge. You have

acquired in all

in all kinds of : Polite Literature, and the Encouragement You conftantly give for the Propagation of them in general, but more particularly to the Mathematical Sciences, are Motives sufficient to direct me to dedicate this Work

to you.

PANEGYRIC, SIR, is not my Province, and if it were, I know I must offend one of your extensive Learning, should I attempt to display it on this Oc. casion : Yet I must say, that if but one fourth Part of the Nobility and Gentle

A 2

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men of opulent Fortunes in this Kingdom, were of your unlimited generous Disposition 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 With of most; but of none more particularly, than of,

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