Divided object-lens micrometer

Made:
1754-1757 in London
maker:
James Short
and
Peter Dollond

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© The Board of Trustees of the Science Museum

Divided object-lens micrometer by Peter Dollond for cassegrain reflecting Telescope of 2 1/2-inch aperture, by James Short, London [224/908 = 9.6].

Details

Category:
Astronomy
Object Number:
1938-713 Pt3
Materials:
brass, complete and glass
Measurements:
overall (estimate): 45 x 180 x 80 mm
type:
instrument component
taxonomy:
  • component - object
  • furnishing and equipment
  • measuring device - instrument
  • micrometer - angle
  • double image micrometer
credit:
Mr Thomas H. Court