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£ Pra6Hcal Surveying j

WHICH IS DEMONSTRATED

. WHICH IS DEMONSTRATED '^J

/fay FROM ITS FIRST PRINCIPLES^- "0^

WHEREIN

EVERY THING THAT IS USEFUL AND CURIOUS

IN THAT ART IS FULLY CONSIDERED AND

EXPLAINED;

PARTICULARLY,

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 ufeful to Perfons who have any Property in

Land, to Lawyers in controverted Surveys,

and to Practical Surveyors.

The whole illuftrated with Copperplates.

THE . FIFTH EDITION.

By ROBERT GIBSON,

Teacher of the Mathematics.
DUBLIN:

Pr1nted By P. WOGAN, No. 23, Old-br1dge.

1795-

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