Observer's chair for Heliometer built by A. & G. Repsold of Hamburg with a 7 1/2 inch object lens by Merz of Munich. Observer's chair for Radcliffe Observatory Heliometer 1840-1848
Observer's stool for Heliometer built by A. & G. Repsold of Hamburg with a 7 1/2 inch object lens by Merz of Munich. Observer's stool for Radcliffe Observatory Heliometer 1840-1848