Transparency, 8 1/2"x6 1/2"
- photographer:
- Royal Observatory, Greenwich
Transparency, 8 1/2"x6 1/2", showing Mercury in Transit, Greenwich 4in. photoheliograph, 1914 November 7
Transparency, 8 1/2"x6 1/2", showing Mercury in Transit, Greenwich 4in. photoheliograph, 1914 November 7