One of nineteen photographs from the Royal Observatory, Cape of Good Hope, South Africa, showing a 7-inch Heliometer with equatorial mounting by Messrs Repsold and Sons, Hamburg. Used widely by Sir David Gill to make stellar parallax measurements from 1887 onwards.
- Object Number:
overall (mount): 405 x 355 x 1.5 mm
- visual and verbal communication
- furnishing and equipment
- measuring device - instrument
- micrometer - angle
- double image micrometer
- Royal Observatory, Cape of Good Hope
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