Stand & Horizontal Circle - Theodolite, Troughton & Simms, 10 Inch

Photographer: Nick Crotty

Source: Museums Victoria

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Photographer: Nick Crotty

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Item ST 22213 Theodolite - 10-inch, Troughton & Simms, London, England, circa 1850s-1870s

Summary

10 inch theodolite made by Troughton & Simms, London. Used at Melbourne Observatory.

Physical Description

Horizontal circle & vertical arcs are divided on silver to 5 minutes. Two opposing micrometer microscopes rigidly fixed to the outer axis are used for reading the horizontal circle. Illuminated axis, lamp & bracket. Tangent screws with spring. Achromatic telescope. Erect inverting & diagonal eyepiece. Stride level.