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On an Instrument for Trisecting any Angle

Published online by Cambridge University Press:  15 September 2014

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Extract

The instrument is delineated in the accompanying drawing. It consists of two thin and flat pieces, AIFD and BHO, of metal or other material. Those pieces are closely connected together hy a cylindrical pin inserted perpendicularly to their flat surfaces through a cylindrical hole at C in each of them, which it fits, and round which they can turn.

Type
Proceedings
Copyright
Copyright © Royal Society of Edinburgh 1904

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