Micrometer

Made:
1851-1860 in Saint-Malo

Micrometer, double image H.O.4, two brass keys and a reading lens, one key clamps to end of rod for separating the half lenses, telescope 2' 7 1/8" long when closed, diam. 2 11/ 16" at each end, leather covered draw tube engraved No. 32 Micrometre Lugeol par Colombi brevete Brest, silvered carriers at O.G. end "GGB No.32, Brest 1851, scales on silver nod 0 to 5 each way subdivided to 12 parts, 30 verniers

Details

Category:
Astronomy
Object Number:
1911-232 Pt2
Materials:
brass, complete, glass, leather, steel
type:
micrometer telescope
taxonomy:
  • component - object
  • furnishing and equipment
  • measuring device - instrument
  • micrometer - angle
  • double image micrometer
credit:
British Admiralty (Hydrographic Department)

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