Hannyngton Extended Slide Rule

Hannyngton Extended Slide Rule

£1500

Circa

1880

Country of manufacture

UK and Ireland

Category: Calculating

Description

An example of Major General Hannyngton’s extended slide rule allowing for more accurate calculations. Made by Aston and Mander.

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GB Fletcher

Fletcher Wallis

Fletcher Wallis sells objects and books relating to the history of science, medicine and technology Arcade. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for forty eight years.

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