D

laft, for a Tenement jon at Daston and

Genement

THE

THEORY and PRACTICE

OF

GAUGING.

Demonftrated in a

SHORT and EASY MET HOD.

CONTAINING, among other PARTICULARS,
The Method of Computing Decimally; extracting the
SQUARE ROOT, with the Conftruction and Ufe of
the SLIDING-RULE explain'd at large.

The Elementary Properties of the CONIC SECTIONS, and
the Manner of describing them in Plano.

General Principles of MENSURATION, with Theorems
for Measuring all right-lin❜d Planes, Parallelopipedons, Prif
matic Solids, the Conic Sections, Conoids, Spindles, their
Segments, and Fruftums, &c.

General Propofition for measuring the Hoofs or Ungula's
of any CONE or PYRAMID; and a new Method for
Measuring by Approximation.

With the APPLICATION of the preceeding Principles to
Practice; and illuftrated throughout by particular Examples.

Published with the particular Approbation of the
Honourable COMMISSIONERS OF EXCISE.

Defign'd for the Ufe of the Officers of that Revenue.

Printed by H. WOOD FALL, without Temple-Bar, for the
AUTHOR: And are to be had at his House in Portland.
Strest, the Corner of Mortimer-ftreet, near Oxford-Market.

M DCC XL.

19 Feb.25.CHWY

CHARLES POLHILL Efq;
JOHN FOWLE Efq;
JAMES VERNON Efq;
ROBERT EYRE Efq;
HORATIO TOWNSHEND Efq;
Sir THOMAS ROBINSON Bart.
WILLIAM BURTON Efq;
JOHN ORLEBAR Efq;
COMMISSIONERS

AND