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Helioscope - Ertel Object 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
Discipline: Technology
Dimensions: 27 cm (Height), 26 cm (Width), 52 cm (Length)
Dimension Comment: Box

More information

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
Primary Classification: ASTRONOMY
Secondary Classification: Research
Tertiary Classification: telescopes
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

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