PRINTED BY GEORGE E. EYRE AND WILLIAM SPOTTISWOODE,
PRINTERS TO THE QUEEN'S MOST EXCELLENT MAJESTY.

PUBLISHED AT THE GREAT SEAL PATENT OFFICE,

25, SOUTHAMPTON BUILDINGS, HOLBORN.

1862.

176.0.71.

PREFACE.

THE Indexes to Patents are now so numerous and costly, as to render their purchase inconvenient to a large number of inventors and others, to whom they have become indispensable.

To obviate this difficulty, short abstracts or abridgments of the Specifications of Patents under each head of Invention have been prepared for publication separately, and so arranged as to form at once a Chronological, Subjectmatter, Reference, and Alphabetical Index to the class to which they relate. As these publications do not supersede the necessity for consulting the Specifications, the prices at which the latter are sold have been added.

The present series of Abridgments relates to Shipbuilding, Repairing, Sheathing, and Launching, and also includes Painting, Lighting, Ventilating, Pumping, Extinguishing Fires, and preventing Shipwreck and other casualties. The Abridgments of the Specifications relating to Anchors, Cables, Rigging, Sails, Steering and Navigating Vessels, &c., are reserved for distinct publication, although some of these subjects form part of the inventions included in this volume, and are referred to in the Subject-matter Index.

January 1862.

B. WOODCROFT.

INDEX OF NAMES.

[The names of persons by whom inventions have been communicated from abroad, when known, are printed in Italics.]