Telescopic Alidade

2019/039

Telescopic alidade made by ER Watts & Son, London

SKU: 2019/039 Categories: ,

Description

Telescopic alidade made by ER Watts & Son, London mounted on a 15 in (381 mm) parallel rule. Fitted wooden case. The telescope can be used as a tacheometer to measure distance.

Alidades were used in conjunction with a plane table for the purpose of drawing plans and mapping. A label in the box lid dates this instrument to 1 August 1939.

Additional information

Acquisition Number

2019/039

Item Type

Short Description

Telescopic alidade by ER Watts & Son, London

Manufactured by

Date of Manufacture

c. 1939

Sub-items

Box (leather strap missing)

Supporting Items

None

Makers Number

19693

Marks

"AL.4" on orange Dymo tape on alidade and box

Dimensions (mm)

381 (L) x 115 (W) x 165 (H)

Donor

Date Donated

August 2019

Materials

Metal and glass

Condition

Good

Display Location