A PRACTICAL MANUAL FORMING A NEW AND SYSTEMATIC GUIDE TO THE REPRODUCTION AND WORKS OF ART BY THE ELECTRO- DEPOSITION OF METALS AUTHOR OF BY J. W. URQUHART, C.E. ELECTRO-PLATING, A PRACTICAL HANDBOOK," ELECTRIC LIGHT, Capio Yumen LONDON CROSBY LOCKWOOD AND CO. 7, STATIONERS' HALL COURT, LUDGATE HILL 1881 [All rights reserved] D. VAN NOSTRAND COMPANY, NEW YORK. HARVARD COLLEGE LIBRARY GIFT OF GINN & COMPANY LONDON: PRINTED BY H: VIRTUE AND COMPANY, LIMITED, CITY BOAD. PREFACE. THE author's endeavour to treat, in an easily appre hended style, upon another branch of the Electrometallurgic art ("Electro-Plating"), has received so much encouragement that he has been induced to offer the present handbook as a companion volume, in the belief that it will meet a want of considerable extent. The distinct art of electro-typing has, within the last few years, advanced with such wonderful rapidity that it is now practised as an important auxiliary in industries of the most varied description. The particular methods employed in the processes ten years ago may now be considered in great part obsolete, improved systems having superseded them. This small treatise is therefore intended to serve as a guide, not only to beginners in the art, but to those who still practise the old and imperfect methods of electro-typing; it aims also at preparing the way for a thorough scientific study of the art, if such be considered necessary for its successful prosecution. |