» Troughton & Simms Theodolite (0491)

Immagini

DESCRIPTION

Exhibit 491 is a Troughton and Simms theodolite, an optical instrument used to measure azimuth and zenith angles and applied regularly in surveying. The apparatus consists essentially of:

A heavy metallic base which rests on three leveling screws;
A horizontal circular graduated scale of 360° divided in 10° intervals;
Three verniers for reading the horizontal circular scale;
A circular vertical scale with three verniers for reading their positions;
Two symmetric microscopes to ease reading the positions of the two circular scales;
Three bubble levels;
A telescope;
An alcohol lamp for illuminating the scales;
A ball-topped lever for orienting horizontally the apparatus;

There are two wood cases, one for the base instrument (Foto-1) and one for the telescope united with the graduated azimuthal circle (foto-1) in exhibit 315.

ISCRIZIONI

Inciso sul supporto: Consorzio Universitario di Torino N. 1.
Inciso sullo strumento: Troughton & Simms, London

BIBLIOGRAPHY

[1] Perucca Eligio, "Fisica Generale e Sperimentale", Vol. Primo; Meccanica - Calore, UTET, Torino, 1937. Pagina 46: Il Teodolite universale.

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