Photographic glass plate and metal ring for use with photoheliograph and Janssen’s apparatus

Made in Sydney, New South Wales, Australia, 1874.

This unexposed Janssen photographic plate is the only one which has survived from the New South Wales project to photograph the 1874 Transit of Venus. These circular plates were used in conjunction with Janssen’s photoheliograph apparatus (H10213), which was attached to the transit telescope (H10211). It was hoped that photographs taken of Venus as it travelled over the surface of the sun would lead to a more precise measurement of the distance of the Earth from the Sun.

The Janssen apparatus ...

Summary

H10379
A Janssen photographic plate. The circular glass plate is contained within a wooden storage box with a hinged lid. Accompanying the glass plate is a flat metal ring. Slots have been carved inside the box to enable the vertical storage of plates.

Dimensions

300 mm
340 mm
310 mm

Production

1874

History

This unexposed Janssen photographic plate is the only one which has survived from the Sydney Observatory, Sydney, New South Wales project to photograph the 1874 Transit of Venus.
Sydney Observatory
Sydney Observatory 1874

Cite this Object

Photographic glass plate and metal ring for use with photoheliograph and Janssen's apparatus 2017, Museum of Applied Arts & Sciences, accessed 18 November 2017, <https://ma.as/232618>
{{cite web |url=https://ma.as/232618 |title=Photographic glass plate and metal ring for use with photoheliograph and Janssen's apparatus |author=Museum of Applied Arts & Sciences |access-date=18 November 2017 |publisher=Museum of Applied Arts & Sciences, Australia}}
This object is currently on display at the Sydney Observatory.
Incomplete

This object record is currently incomplete. Other information may exist in a non-digital form. The Museum continues to update and add new research to collection records.

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