South Phecles. The Second day of Iman.. 1760. 1. 5.

laft,
cat Haston and

for a Tonomont 2 a Genom

otherwise the fame will be Distrain'd for, without further Notice.

4

Containing, among other PARTICULARS,
The Method of Computing Decimally; extracting the
SQUARE ROOT, with the Construction 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.

A General Proposition 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 illustrated throughout by particular Examples.

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

Design'd for the Use of the Officers of that Revenue.
By ROBERT SHIRTCLIFFE.

LONDON:

Printed by H. WOODFALL, without Temple-Bar, for the
AUTHOR: And are to be had at his House in Portland
Street, the Corner of Mortimer-ftreet, near Oxford-Market.
M DCC XL.

19 Feb.2SEHW

CHARLES POLHILL Esq;
JOHN FOWLE Esq;
JAMES VERNON Efq;
ROBERT EYRE Esq;
HORATIO TOWNSHEND Efq;
Sir THOMAS ROBINSON Bart.

4

WILLIAM BURTON Efq;
JOHN ORLEBAR Efq;

COMMISSIONERS

AND

GOVERNOURS

Of and for the MANAGEMENT and RECEIPT of

His MAJESTY's Revenues of the
Excife, Malt, &c.

Within that Part of Great-Britain call'd
ENGLAND;

1

The following Treatife is, with the greatest Submission, humbly infcrib'd by

Their most Obedient,

and most Faithful Servant,

ROB. SHIRTCLIFFE.

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