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Dip Circle - Kew Pattern, Henry Barrow & Co, circa 1860 Reg. No: ST 022128
- Dip circle made by Henry Barrow & Co, London. Kew pattern, No. 41, circa 1860. Used at Melbourne Observatory.
This was used to measure the total force as well as the inclination to the horizontal of the earth's magnetic field.
- Contents from List of Parts Field:
Circle divided to 0.5 degrees, and vernier divided from 0 to 30, enabling minutes of arc to be read off.
- Acquisition Information:
- Transfer from Melbourne Observatory, 1945
|Dimensions:||23.00 cm (Height), 24.00 cm (Width), 30.00 cm (Length)|
|Dimension Comment:||Wooden box dimensions.|
|Tagged with:||dip circles, geophysical apparatus instruments, magnetic instruments|
|Themes this item is part of:||Magnetic Observations at Flagstaff & Melbourne Observatories, Melbourne Observatory 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:||PHYSICAL SCIENCES|
|Secondary Classification:||Geophysics - Geomagnetism|
|Tertiary Classification:||measuring equipment|
|Inscriptions:||Marked on circle "HENRY BARROW & CO. 26 OXENDON ST. LONDON". "No. 41"
Marked on wooden frame "327"
|Maker:||Henry Barrow & Co, London, Middlesex, England, Great Britain, circa 1860|
|User:||Melbourne Observatory, South Yarra, Victoria, Australia, circa 1860|
This item is part of the following themes:
- Magnetic Observations at Flagstaff & Melbourne Observatories
- Melbourne Observatory 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