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Glass plate photograph plate measurer for positional astronomy by Henry Porter

Glass plate photograph plate measurer for positional astronomy by Henry Porter

1853-1856
Star plate measuring machine (X-Y) with eyepiece labelled Cooke, Troughton and Simms, specially made by Sir Howard Grubb to measure plates taken with the Radcliffe Astrograph (twin 18-inch & 24-inch refractor) for parallax observations. Originally at Radcliffe Observatory (1901-1938), Oxford, then University of London Observatory (1938-1984), Mill Hill, London.

Star plate measuring machine (X-Y) with eyepiece labelled Cooke

1900-1902
X-Y Plate measuring machine by Carl Zeiss, Jena, serial no.12945, with accessories. Also referred to as ‘Galaxy machine’, it was used at the Royal Greenwich Observatory, Herstmonceux in East Sussex from 1960s to 1990.

X-Y Plate measuring machine by Carl Zeiss

1960-1965
Base for 'Galaxy' automatic plate measuring machine, c. 1969

Base for 'Galaxy' automatic plate measuring machine

1967-1972
X-Y Plate measuring machine by Carl Zeiss, Jena, serial no.12945, with accessories. Used at the Royal Greenwich Observatory, Herstmonceux in East Sussex from 1960s t0 1990.

X-Y Plate measuring machine by Carl Zeiss

1960-1965