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ΤΟ

COLONEL DOYLE,

OF

HIS MAJESTY'S HONORABLE BOARD

OF

EXCISE;

AND TO THE REST OF THE

Honorable the Commissioners

OF

THE REVENUE,

THIS NEW TREATISE ON GAGING,

PATRONIZED BY THEIR HONORS,

IS (WITH PERMISSION)

HUMBLY DEDICATED,

BY

THEIR HONORS' MUCH OBLIGED AND

MOST OBEDIENT SERVANT,

M. ILEY.

PREFACE.

NOTWITHSTANDING the many Treatises now extant on the ART OF GAGING, the want of a book in which the Theory and Practice of that useful branch of the Mathematics should be concisely, and at the same time more clearly and systematically explained than heretofore, and in which New Tables and better practical methods than are usually given, should be introduced, has been long felt, not only by young practitioners in the Excise, but even by officers of experience.

With the view of supplying this defect, the following sheets are presented to the public, no pains having been spared to render them worthy of general patronage.

The subject advances gradually through the several parts of knowledge upon which the

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