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Helioscope - Ertel Reg. No: ST 022161
- Heiloscope made by Ertel & Son, Munich. The helioscope is a telescope for viewing the sun without injury to the eyes, by means of blackened glass on mirrors that reflect only a part of the light. Used at Melbourne Observatory.
- Base has 3 lateral legs with levelling screws. On top of base is rotating wye to support telescope that is rotated on longitudinal axis by worm drive at eyepiece end. At objective end is frame which alters angle of mirrors to reflect only part of light from sun so that the sun can be viewed without injury to the eyes.
- Acquisition Information:
- Transfer from Melbourne Observatory, 1945
|Dimensions:||27 cm (Height), 26 cm (Width), 52 cm (Length)|
|Tagged with:||astronomical instruments, helioscopes, telescopes|
|Themes this item is part of:||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|
|Inscriptions:||Marked "Ertel & Sohn in Munchen"
Box has Victorian Railways label on top: "LUGGAGE TICKET/ MACEDON / TO/ MELBOURNE"
|Maker:||Ertel & Sohn, Munchen, Germany|
|User:||Melbourne Observatory, South Yarra, Victoria, Australia|
This item is part of the following themes:
- 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