Ramsden's astronomical equatorial instrument, with 2-1/4 inch aperture and 18-inch focal length

Made:
1770-1780 in London
maker:
Peter Dollond
and
Jesse Ramsden

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Ramsden's astronomical equatorial instrument, 2-1/4 inch aperture and 18-inch focal length, on an adjustable equatorial mounting with tripod stand. The stand is equipped with 3 spirit levels, 3 levelling screws and 2 scales read by verniers.

Details

Category:
Astronomy
Materials:
glass and metal
Measurements:
overall (assembled): 800 x 510 x 400 mm
Identifier:
1928-1329 Pt2
type:
instrument component
taxonomy:
  • component - object
  • furnishing and equipment
  • tools & equipment
  • scientific equipment
  • astronomical instrument
credit:
Athenaeum (London)