Watch Passage De Venus (1874) (1874)
Source And Credit
This video is hosted by and streams from Internet Archive, credited to P.J.C. Janssen. License stated there, Public Domain. Every right stays with its owner. Request removal.
About This Film
The 1874 passage of Venus over the face of the sun was very popular with scientists. Many expeditions to the best viewing points in the world were organized; at least 62 parties would visit 80 locations. In preparation much effort was made to find the best techniques to get objective and permanent records of the event. Frenchman inventor Janssen came up with the idea for a "revolver...
