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WATCH AND CLOCK

ESCAPEMENTS

A Complete Study In Theory and Practiceof the Lever, Cylinder and ChronometerEscapements, Together with a BriefAccount of the Origin and Evolutionof the Escapementin Horology

Compiled from the well-known Escapement Serialspublished in The Keystone

NEARLY TWO HUNDRED ORIGINAL ILLUSTRATIONS

PUBLISHED BY
THE KEYSTONE
THE ORGAN OF THE JEWELRY AND OPTICAL TRADES
19th & Brown Sts., Philadelphia, U.S.A.

All Rights Reserved

Copyright, 1904, BY B. Thorpe,Publisher of The Keystone.

PREFACE

Especially notable among the achievements of The Keystone in the fieldof horology were the three serials devoted to the lever, cylinder andchronometer escapements. So highly valued were these serials whenpublished that on the completion of each we were importuned to republishit in book form, but we deemed it advisable to postpone such publicationuntil the completion of all three, in order that the volume should be acomplete treatise on the several escapements in use in horology. Therecent completion of the third serial gave us the opportunity torepublish in book form, and the present volume is the result. We presentit to the trade and students of horology happy in the knowledge that itscontents have already received their approval. An interesting additionto the book is the illustrated story of the escapements, from the firstcrude conceptions to their present perfection.

CONTENTS