A 19th-Century lacquered-brass mechanical integrator,

Lot 580 / Sale 7451
<b>a 19th-century lacquered-brass mechanical integrator,</b>

Price Realized £1,840
($3,055)
Sales totals are hammer price plus buyer’s premium and do not reflect costs, financing fees or application of buyer’s or seller’s credits.

Estimate
    £1,000 - £1,500
  • ($1,660 - $2,490)

Sale Information Sale 7451
Fine Scientific Instruments
13 December 1996
London, South Kensington

Lot Description A 19th-Century lacquered-brass mechanical integrator,
signed J. Amsler, numbered 830, and stamped on the limb 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 -- 14.1/4in. (36.2cm.) wide

See Illustration


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.

Literature 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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