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Altitude & Azimuth Instrument - Troughton & Simms, 12 Inch
Reg. No: ST 029083
- Summary:
- Altitude and azimuth instrument, 12 inch circle, made by Troughton & Simms, London.
This instrument was used for the Geodetic Survey of Victoria, 1858-71, which established the primary surveying points throughout the colony. Also used by Melbourne Observatory. - Description:
- Circles graduated on silver & read by verniers.
In two wooden boxes: 1. stand and horizontal circle; 2. telescope and vertical circle. - Acquisition Information:
- Transfer from Melbourne Observatory, 1945
| Discipline: | Technology |
| Dimensions: | 70 cm (Height), 38 cm (Width), 38 cm (Length) |
More information
| Tagged with: | surveying apparatus instruments, theodolites |
| Themes this item is part of: | Troughton & Simms, Instrument Makers, Melbourne Observatory Collection, Engineering Collection, Science & Measurement 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: | Marked "S.G.O. 103". [ie Surveyor General's Office] Labels inside boxes: "R. SKILTON, INSTRUMENT MAKER". |
| Maker: | Troughton & Simms, London, Middlesex, England, Great Britain |
| User: | Victoria: Geodetic Survey of Victoria, Victoria, Australia, 1858-1871 |
| User: | Melbourne Observatory, South Yarra, Victoria, Australia |
Themes
This item is part of the following themes:
- Troughton & Simms, Instrument Makers
- Melbourne Observatory Collection
- Engineering Collection
- Science & Measurement 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
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