The description of a sector, for giving the proportionable sizes of wheels and pinions
Subtitle: and for determining the proper distance of their centers from each other : of great use to all clock and watch makers
By: made and considerably improved by R. Pennington
Publisher: Printed for Mess. Richardson and Urquhart ...
Published: 1780
Place of publication: London
Language: eng
Number of pages: 16
Subjects: Gearing; Design and construction; Early works to 1800; Clock and watch making; Equipment and supplies
Notes: Signature: A⁸.