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Sympalmograph in fitted box

c. 1877

Geometrical pen

Box labelled "Corder 1950-181 Harmonograph (spares)" filled with accessories for Corder's Harmonograph. Including: 37 brass gearwheels, drawings, a notebook, ruler, pens and brass components for chronograph.

Box of accessories for Corder's Harmonograph

Geometrical pen: complete in fitted case,

Geometrical pen: complete in fitted case,

Geometrical pen by W.F. Stanley, in box, Great Turnstile, London

Geometrical pen by W.F. Stanley

Harmonograph invented by Frederick Corder, with accessories

Harmonograph invented by Frederick Corder

Cog wheel "harmonograph"

Cog wheel "harmonograph"

Geometrical pen with 12 changeable gear wheels by W.F. Stanley, London, 1876.

Geometrical pen with 12 changeable gear wheels by W.F. Stanley

1876
Compound geometric chuck by Henry Perigal, with handle, in case

Compound geometric chuck by Henry Perigal

Donkin's Harmonograph for compounding two simple harmonic motions, made in 1871, with five printed sheets showing curves obtained by a slightly modified instrument made by Tisley and Spiller

Donkin's Harmonograph

1871-1873