Accession No

2805

Brief Description

American transit, by E. Brown and Son, U.S.A., 1850 (c)

Origin

U.S.A.; New York

Maker

E. Brown and Son

Class

surveying

Earliest Date

1850

Latest Date

1850

Inscription Date

Material

metal (brass, silver); glass; wood

Dimensions

box height 352mm; breadth 240mm; depth 285mm

Special Collection

Provenance

Purchased from Historical Technology Inc., Masssachustts, USA, 01/1982. Purchased with assistance from the Preservation Fund, Science Museum (PRISM).

Inscription

‘E. Brown & Son
NEW YORK’ (on compass rose)
(In box, trade label for W & L.E. GURLEY.)

Description Notes

Brass; enclosed horizontal circle, divided on silver 0-180-0 by 10 to 30’; opposing verniers to 1’; clamp and slow motion screw for vernier plate. Silvered 8 point compass rose divided 0-90-0 twice by 10 to 30’; transverse bubble; longitudinal bubble on ‘V’ shaped frame; supports telescope axis; rack and pinion focus; erecting lens; cross hairs; longitudinal bubble slung below; transits over eyepiece and objective; clamp and slow motion screw for vertical motion of telescope but vertical arc missing. 4 foot screws through parallel plates; ray shade; fitted wooden box.

References

Events