MANIPULATIONS

IN THE

SCIENTIFIC ARTS.

PART I. and II.

ELECTROTYPE MANIPULATION.

ELECTROTYPE MANIPULATION.

PART I. and II.

BEING

THE THEORY, AND PLAIN INSTRUCTIONS

IN THE ART OF

WORKING IN METALS,

BY PRECIPITATING THEM FROM THEIR SOLUTIONS,

THROUGH THE AGENCY OF

GALVANIC OR VOLTAIC ELECTRICITY.

BY

CHARLES V. WALKER,

HONORARY SECRETARY TO THE LONDON ELECTRICAL SOCIETY; EDITOR OF

THE ELECTRICAL MAGAZINE, KAEMTZ’S METEOROLOGY, &c. &c.;

TELEGRAPH ENGINEER AND SUPERINTENDENT TO THE

SOUTH-EASTERN RAILWAY COMPANY.

Illustrated by Woodcuts

TWENTY-THIRD EDITION.

LONDON.