Accession No

2554


Brief Description

clinometer by Troughton & Simms, c.1850


Origin

London


Maker

Troughton & Simms


Class

surveying


Earliest Date

Jan. 1, 1850


Latest Date

Dec. 31, 1850


Inscription Date


Material

metal (brass and one other); glass; liquids


Dimensions

length 216mm; height 70mm; thickness 25mm box length 248mm; breadth 102mm; height 34mm


Special Collection


Provenance

Purchased from Peter Delehar, 05/1980


Inscription

‘Troughton & Simms,
LONDON’ (quadrant)


Description Notes

Brass quadrant on extended base plate, graduated 0 - 90˚, numbered by 10˚, divided to 1˚, and graduated for ‘Links in a chain Diff of Hypo & Base’, 0 - 100 on a reducing scale, numbered 1, 2, 5, 10, 20…100 (divided to 1/4 from 0-2, and then to 1; 27-1-2000). Hinged pinhole and window sight (with wire crosshairs) on reverse of base. Bubble with indicator plate moves over quadrant; bevelled edge at scale; detachable hinged mirror for viewing bubble. Two holes, one on perpendicular plate, suggest attachment to another instrument. Wooden case.
Two brass washers and two screws (possibly part of instrument).

Condition: good; complete.


References


Events


FM:39617

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