Farmer’s Rule, The Standard Slide Rule for the Entire Wine and Spirit Trade

Farmer’s Rule, The Standard Slide Rule for the Entire Wine and Spirit Trade

£100

Dimensions

18 inches

Circa

1920

Country of manufacture

UK and Ireland

Category: Calculating

Description

Early twentieth century, double side with cursor slide rule for the wine trade. Made of celluloid panels on wood. In good condition

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GB Fletcher

Fletcher Wallis

Fletcher Wallis sells objects and books relating to the history of science, medicine and technology from his unit at Admiral Vernon Arcade Portobello Road. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for thirty five years.

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