Lot 160

Cased set of brass drawing instruments, Troughton and Simms, London
Circa 1826-50


The Library of James Stirling, Mathematician
Auction: 23 October 2025 from 13:00 GMT
Description
the instruments include a large finely engraved sliding rule, signed 'Troughton & Simms, London', a brass sliding bridge rule, a caliper slide, a larger brass and steel compass, a similar smaller compass, an articulated brass and steel drawing pencil/pen point, two other similar points, all inside a fitted velvet lined leather box (the box 34.5cm long x 11cm wide)
Footnote
Troughton & Simms was a British instrument-making firm. Their shop in Fleet Street became the hub of the finest scientific instrument making in London during a period in which there was increasing demand for precision instruments for astronomy, surveying and measurement. They created instruments for Greenwich Observatory as well as exploring and surveying expeditions.

