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GALVANOPLASTIC MANIPULATIONS.

A PRACTICAL GUIDE

FOR THE

GOLD AND SILVER ELECTROPLATER

AND THE

GALVANOPLASTIC OPERATOR.

COMPRISING

THE ELECTRO-DEPOSITION OF ALL METALS BY MEANS OF THE BATTERY AND
THE DYNAMO-ELECTRIC MACHINE, AS WELL AS THE MOST APPROVED
PROCESSES OF DEPOSITION BY SIMPLE IMMERSION, WITH DE-
SCRIPTIONS OF APPARATUS, CHEMICAL PRODUCTS

EMPLOYED IN THE ART, ETC.

BASED LARGELY ON THE

“MANIPULATIONS HYDROPLASTIQUES” OF ALFRED ROSELEUR.

BY

WILLIAM H. WAHL, PH.D. (Heid.),

SECRETARY OF THE FRANKLIN INSTITUTE.

ILLUSTRATED BY ONE HUNDRED AND EIGHTY-NINE ENGRAVINGS.

PHILADELPHIA:
HENRY CAREY BAIRD & CO.,
INDUSTRIAL PUBLISHERS, BOOKSELLERS, AND IMPORTERS,

810 WALNUT STREET.

LONDON:
SAMPSON LOW, MARSTON, SEARLE & RIVINGTON,
CROWN BUILDINGS, 188 FLEET STREET.

1883.

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PREFACE.

The present work had its origin in a request of the publishers that the author would prepare a translation of the last edition of ROSELEUR's well-known Manipulations Hydroplastiques — a treatise which has deservedly acquired a high reputation among galvanoplastic operators as a reliable and useful work of reference.

An examination, however, revealed the fact that it did not, in a number of important particulars, adequately represent the present state of the art, especially as developed and practised in the United States.

On this account, therefore, it was thought advisable to prepare a treatise, which, while it should have for its basis the admirable practical instructions of ROSELEUR, should, in addition, embrace also all the more recent and important processes, methods, and formulæ that have been proposed—in a word, to re-write the entire work, so that it should properly represent the present state of the galvanoplastic art.

As to how far this undertaking has been successful, the present volume must speak for itself. It has been prepared in the 'brief intervals of leisure snatched from other and absorbing professional occupations, and the writer is fully conscious of the fact that in many respects it could have been made more complete. He desires to express his indebtedness to the Meriden Britannia Company of Meriden, Conn., the William Rogers Manufacturing Company of ? Hartford, Conn., Messrs. Ledig & Herrlein of Philadelphia, and

Noony

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