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. ... Made and considerably improved by R. Pennington.
Series: Eighteenth century -- reel 7343, no. 03.
Publisher: printed for Mess. Richardson and Urquhart
Published: 1780
Place of publication: London
Language: eng
Format: Microform
Number of pages: 15
Notes: Microfilm. Woodbridge, CT Research Publications, Inc., 1986. 1 reel ; 35mm. (The Eighteenth Century ; reel 7343, no.03).