Accession No

3254

Brief Description

plate comparator, 19th C

Origin

Maker

Class

astronomy

Earliest Date

1800

Latest Date

1900

Inscription Date

Material

metal (iron, brass); glass

Dimensions

length 370mm; breadth 165mm; height 310mm

Special Collection

Provenance

Transferred from Institute of Astronomy, University of Cambridge, Cambridge, England, 08/1985.

Inscription

Description Notes

Iron tripod stand with brass column supports a horizontal iron plate in which is set a flat brass plate, with a glazed brass rectangle set on top of it at the right hand end. Two knurled screws for adjusting the lower brass plate in some way. The glazed brass piece has a scale divided 0 - 100, numbered by 10.
Two microscope systems set above the plate on arced iron braces. Each has a wheel for adjustments graduated 0 - [100], numbered by 10, subdivided to 1. Left hand one has a rack and pinion adjustment with knurled brass screw; also the holder for an adjustable mirror below the iron plate. The right hand one has a second lens attached the side of the eyepiece with a mirror mounted above the secondary lens.

Condition good; complete.

References

Events