|
Date: |
|
Description: | Circular glass plate negative with 60 exposures of what appears to be Venus crossing the Sun's limb with a number scratched on the glass every tenth. The diameter of the glass plate is 255mm. It consists of a circular negative in glass wooden frame, with a perspex cover on front. Recent research at the Royal Observatory, Paris suggests that this plate is a positive made from the original negative plate taken at Roorkee (India) on the Transit of Venus 1874 between two contacts using a Janssen 'revolver'. However the instrument used at Rourkee - De La Rue's instrument - was only 273mm diameter suggesting the positive might have been enlarged. Janssen's revolvers are generally regarded as playing an important part in the development of cinema.
AUDIT - object needs marking with its identity number.
Inscription. Negative number B5948b
caption: Photo negative
caption: Glass negative with wood holder | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | astrological body: Venus photographic negatives Transit of Venus Janssen Pierre Jules Cesar | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
|
|