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Artificial Horizon - Surveyor-General's Office, Victoria
Reg. No: ST 022153
- Summary:
- Artifical horizon used at Melbourne Observatory, and also in Geodetic Survey of Victoria.
The artificial horizon was used, especially in field observations, to establish the elevation of the sun or a star when the horizon was not visible. The vertical angle between the sun or star and its reflection in the mercury was measured; this was halved to establish the angle of elevation above the horizon. - Description:
- Black glass in rectangular brass stand with 3 levelling screws. With fitted wooden box. Spirit level missing.
- Acquisition Information:
- Transfer from Melbourne Observatory, 1945
| Discipline: | Technology |
| Dimensions: | 3 cm (Height), 10 cm (Width), 12 cm (Length) |
More information
| Tagged with: | artificial horizons, geodetic surveys, surveying apparatus instruments, williamstown observatory |
| 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 |
| Tertiary Classification: | artifical horizons |
| Inscriptions: | Base inscribed 'S.G.O. no 34'. SGO= Surveyor-General's Office, and indicates the instrument was probably used in the Geodetic Survey of Victoria. |
| User: | Melbourne Observatory, South Yarra, Victoria, Australia |
Themes
This item is part of the following themes:
- 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
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