Accession No

2752

Brief Description

reflecting telescope, Gregorian, by Nairne and Blunt, circa 1793

Origin

England; London

Maker

Nairne and Blunt

Class

astronomy; optical

Earliest Date

1793

Latest Date

1793

Inscription Date

Material

metal (brass); glass

Dimensions

l (barrel) 648 mm; d (barrel)110 mm; box length 778mm; breadth 260mm; height 141mm

Special Collection

Provenance

Purchased from Historical Technology Inc, Catalogue 121, Winter 1980, 08/04/1981. Purchased with assistance of grant from Preservation Fund, Science Museum, London (PRISM)

Inscription

NAIRNE AND BLUNT London 3/191=812

Description Notes

Gregorian Reflecting telescope, brass. Barrel with open sights, push fit cover. Eye end (mirror cell not readily removeable) with screw in eyepiece, single draw tube, with screw on shade. Speculum metal primary and secondary mirrors, the secondary on mount held in slot by clip. Focus by long screw moving secondary mirror from eye end. Two knurled screws secure barrel to altazimuth mount on pillar and folding tripod stand with cabriole feet. Second eyepiece with screw on eyestop threaded for filter.
Mahogony box.
good condition

References

Events