Accession No

2111

Brief Description

photomeasuring micrometer, by Adam Hilger, English, c.1874-1904

Origin

England; London

Maker

Adam Hilger

Class

metrology

Earliest Date

1874

Latest Date

1904

Inscription Date

Material

metal (brass, other); wood; glass

Dimensions

length 574mm; breadth 300mm; height 480mm

Special Collection

Provenance

Transferred from Institute of Astronomy, University of Cambridge, Cambridge, England, 10/1975. Transferred from Solar Physics Laboratory, Cambridge to the Institute of Astronomy, University of Cambridge, unknown date. Transferred to Cambridge University in 1913 when Solar Physics Laboratory, South Kensington moved to Cambridge (renamed Solar Physics Laboratory, Cambridge). (?) originally owned by the Solar Physics Laboratory, South Kensington, London (founded 1878).

Inscription

‘A Hilger, London’
‘SOLAR PHYSICS 87’

Description Notes

Micrometer screw moving platform carrying reading microscope. Brass drumhead divided 0-200 by 1, with vernier on brass reading to 0.1. Linear scale divided on brass 0-5 ins, divided to 0.1”, and subdivided to 0.02”. Tripod stand on metal plate screwed to wooden base, platform for photograph, with concave mirror beneath, sliding between strips with two clamping screws. All set on wooden base with glass cover.

References

Events