|
Date: |
|
Description: | Circular glass plate negative with 44 exposures of what appears to be Venus crossing the Sun's limb. In fact all 44 images are the same and were made as test plates to check observers knew how to use the new 'revolver' invented by Jules Janssen before they tried it out on the actual Transit of Venus in 1874. The diameter of the glass plate is 209mm. Two paper labels stuck onto glass give details of the photograph, and the date. The plate is in a buff cardboard box. For the 1874 Transit George Biddell Airy ordered 5 English 'Janssens' to be send to Dallmeyer (the maker of the photoheliographs with which they would be used). A number of test plates like this one exist in our collections and others around the world, but none of the plates taken of the actual transit with any of Janssen's revolvers are known to have survived. Janssen's revolvers are generally regarded as playing an important part in the development of cinema.
AUDIT - object needs marking with its identity number.
negative number B5948a
caption: Glass plate | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Airy photographic negatives Dallmeyer J. H. Transit of Venus George Biddell Janssen Pierre Jules Cesar | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
|
|