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Theodolite - Ertel, 7 Inch, 1850s Object Reg. No: ST 22159

Summary:
Theodolite, 7 inch circle, made by Ertel & Sohn, Munich, 1850s. Used at Melbourne Observatory.

A theodolite is used in surveying to measure the angle between distant objects as seen from a given location.
Acquisition Information:
Transfer from Melbourne Observatory, 1945
Discipline: Technology
Dimensions: 360 mm (Height), 270 mm (Width), 225 mm (Length)

More information

Tagged with: surveying apparatus instruments, theodolites
Themes this item is part of: Melbourne Observatory Collection, Engineering Collection, Science & Measurement Collection, Transport Collection, Positional Astronomy at Melbourne Observatory, Weights & Measures at Melbourne Observatory, Melbourne Observatory & Standard Time in Victoria, Astrographic Catalogue, Transits of Venus, 1874 & 1882, Buildings at Melbourne Observatory, Star Observations & Personal Equation, Meteorology at Melbourne Observatory, 1863-1908, Melbourne Observatory, 1863-1944, Geodetic Survey of Victoria, 1858-1872
Primary Classification: SURVEYING & NAVIGATION
Secondary Classification: Optical - Surveying
Tertiary Classification: angular measurement
Inscriptions: Horizontal circle marked 'Ertel & Sohn in re Munchen'.
Maker: Ertel & Sohn, Munich, Bavaria, Germany, 1850s
User: Melbourne Observatory, South Yarra, Victoria, Australia

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