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TN

273 • B875 18ss

A TREATISE

ON

MIN E-SUR VE YING.

Published with Concurrence of the Surveyors-General of New South

Wales and Victoria.
Second Edition Half-Bound, Folio, Price 218.

TRAVERSE TABLES: Computed to 4 Places Decimals for every Minute of Angle up to

100 of Distance.
FOR THE USE OF SURVEYORS AND ENGINEERS.

By R. LLOYD GURDEN, Authorised Surveyor for the Governments of New South Wales and Victoria "Mr. GURDEN is to be thanked for the extraordinary labour which he has bestowed on facilitating the work of the Surveyor.

An almost unexampled instance of professional and literary industry."- Athin æum.

“Those who have experience in exact SURVEY-WORK will best know how to appreciate the enormous amount of labour represented by this valuable book. The computations enable the user to ascertain the sines and cosines for a distance of twelve miles to within half an inch, and this BY REFERENCE TO BUT ONE TABLE, in place of the usual Fifteen minute computations required. This alone is evidence of the assistance which the Tables ensure to every user, and as every surveyor in active practice has elt the want such assistance, few knowing of their publication will remain without them."-Engineer.

“We cannot sufficiently admire the heroic patience of the author, who, in order to prevent error, calculated each result by two different modes, and, before the work was finally placed in the Printers' hands, repeated the operation for a third time, on revising the proofs."-Engineering.

SECOND ENLARGED AND REVISED EDITION.

In Royal 8vo, with Numerous Illustrations, 36s. ELEMENTS OF METALLURGY: A Practical Treatise on the Art of Extracting Metals from their Ores. By J. ARTHUR PHILLIPS, C.E., F.R.S., F.C.S., F.G.S.,

Ancien Elève de l'Ecole des Mines, Paris. REWRITTEN AND EDITED BY THE AUTHOR, AND BY H. BAUERMAN, F.G.S.

CONTENTS.-Refractory Materials-Fire-clays-Fuels, &c.--Antimony-Arsenic-ZincIron-Cobalt-Nickel-Mercury - Bismuth – Lead – Aluminium - Copper - Tin — GoldSilver-Platinum, &c. “The value of this work is almost inestimable."--Mining Journal.

Many NOTABLE ADDITIONS will be found in the sections devoted to IRON, LEAD, COPPER, SILVER, and GOLD, dealing with new Processes and Developments.

* *

Medium 8vo, with 43 Lithographic Plates and numerous other

Illustrations, 258. HYDRAULIC POWER AND HYDRAULIC MACHINERY, FOR THE USE OF PRACTICAL ENGINEERS AND STUDENTS.

By H. ROBINSON, M. Inst. C.E., Professor of Surveying and Civil Engineering, King's College, London. "A book of great Professional usefulness."-Iron.

LONDON : CHARLES GRIFFIN & CO., EXETER ST., STRAND.

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ASSOCIATE OP THE ROYAL SCHOOL OF MINES; FELLOW OF THE GEOLOGICAL SOCIETY AND OP
THE INSTITUTE OF CHEMISTRY; ASSOCIATE-MEMBER OF THE NORTH OF ENGLAND
INSTITUTE OF MINING ENGINEERS; INSTRUCTOR IN MINE-SURVEYING
AT THE NORMAL SCHOOL OF SCIENCE AND ROYAL

SCHOOL OF MINES.

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CHARLES GRIFFIN AND COMPANY,
EXETER STREET, STRAND,

1888.

(All Rights Reserved.)

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No apology is required for any well-considered attempt to provide a manual of Mine-Surveying for the use of English readers. The absence of any general work on the subject has long been a source of practical inconvenience alike to teachers and students. The text-books recommended to candidates for the examination in Mine-Surveying held by the City and Guilds of London Institute, namely, Budge's Practical Miner's Guide, published in 1825, and Hoskold's Practical Treatise on Mining, Land, and Railway Surveying, published in 1863, are too limited in their scope, the former dealing only with the mines of Cornwall, the latter only with those of the Forest of Dean; besides which both works are out of print, and increasingly difficult to procure.

The present work is intended primarily for students, and embodies the substance of the course of instruction in MineSurveying given at the Royal School of Mines. At the same time, it will also, it is hoped, be found useful as a companion to the standard works of reference on Land-Surveying.

In the plan of the book, the surveying of collieries and that of metalliferous mines do not receive separate treatment. The two have much in common, and the one may often advantageously borrow a method from the other. Few mine-surveyors in Great Britain appear to be acquainted with the methods and instruments used abroad. This is the more to be regretted, as no mine-surveys made in this country approach in accuracy those of the collieries of Pennsylvania, or those of the metalliferous mines of the Harz. Attention therefore has been directed to the recent improvements in foreign practice. With the exception of a few diagrams borrowed from Professor

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