A rare 19th-Century lacquered-brass mechanical integrator,

Details

A rare 19th-Century lacquered-brass mechanical integrator,
by Jakob Amsler, signed J. Amsler, No. 835, and further engraved STANLEY, LONDON, the assembly comprising a main frame with two hardened steel wheels and counterpoise, the whole pivoted on the shaped bridge, raised with gear motion, steel fulcrum, fretted bell-shaped sub assembly with articulated arm and bone/ivory scale planimeter attachment, with accessories, in fitted oak case -- 14¼in. (36.2cm.) wide

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Lot Essay

Jakob Amsler, Professor of Mathematics at the University of Schafhausen in Switzerland constructed his polar planimeter in about 1854. The integrator, a further development of this instrument, was specifically designed for use by naval architects for the measurement of metacentric heights etc.

c.f. Prof. Gerard L'E. Turner, Nineteenth Century Scientific Instruments, p.227-229
W.F. Stanley & Co. Ltd., Catalogue 1912 p.177

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