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WATCH AND CLOCK ESCAPEMENTS
A Complete Study in Theory and Practice of the Lever, Cylinder and
Chronometer Escapements, Together with a Brief Account of the Origin
and Evolution of the Escapement in Horology
Compiled from the well-known Escapement Serials
published 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.
1904
All Rights Reserved
Copyright, 1904, By B. Thorpe,
Publisher of the Keystone.
PREFACE
Especially notable among the achievements of The Keystone in the field
of horology were the three serials devoted to the lever, cylinder and
chronometer escapements. So highly valued were these serials when
published that on the completion of each we were importuned to republish
it in book form, but we deemed it advisable to postpone such publication
until the completion of all three, in order that the volume should be a
complete treatise on the several escapements in use in horology.
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