Groombridge Transit Circle, 1820.
4 0 c m
 
34cm
actual image size: 26cm x 32cm

Groombridge Transit Circle, 1820.

© Science Museum / Science & Society Picture Library

Description

Print of 'Troughton's Mural Circle', an astronomical instrument. The engraving, taken from 'Rees Cyclopedia' published 1812-1820, shows a transit circle built by the London instrument maker, Edward Troughton (1753-1835). Stephen Groombridge, a London merchant, commisioned this instrument and used it to compile a catalogue of north polar stars. Such was the accuracy of his work, Groombridge's catalogue was still of value well into the twentieth century.
 

Image Ref.

10418961
 

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