Level

1973/035

16 in dumpy level made by W. & S Jones, 30 Holborn, London

SKU: 1973/035 Categories: ,

Description

16 in dumpy level in brass comprising telescope with bubble level slung beneath mounted over a limb containing a compass with silvered dial engraved “W. & S Jones 30 Holborn / London” (as retailer). 4-screw levelling head. In fitted case. Used for measuring vertical distances between points in conjunction with a levelling staff. This instrument was used for levelling in Leith Docks. The tripod is marked “Leith Dock Commission”.

Rack and pinion focusing of the objective; fixed graticule (wire missing); push focus erecting eyepiece. Objective cap and optional shade tube. Compass divided into degrees. Combined level axis and parallel plate but with provision in the case for the axis to remain mounted below the line. The parallel plate screws must be partly withdrawn for the plate to fit the case, Turned wooden ring of unknown purpose. Trade label for “W. & S. JONES. / Opticians &c / No. 30 Lower Holborn, / LONDON”.

Letters on file relate to the manufacture of this item. It was exhibited at the “Exhibition of Civil Engineering Works”, Glasgow, 21 September – 23 October 1977.

Additional information

Acquisition Number

1973/035

Item Type

Short Description

16 in dumpy level

Manufactured by

Date of Manufacture

c. 1830

Sub-items

Box and tripod (in Store Room)

Supporting Items

None

Makers Number

None

Marks

Engraved "W & S Jones 30 Holborn/LONDON" and "LEITH DOCK COMMISSION". The tripod is marked "LEITH DOCKS COMMISSION".

Dimensions (mm)

495 x 105 x 185. Case 520 x 170 x 115. Tripod height (closed) 1580.

Donor

Date Donated

June 1973

Materials

Brass

Condition

Good – showing signs of wear

Display Location

,