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Backstaff

Snowshill Manor © National Trust / Claire Reeves & team

Category

Scientific instruments

Date

1746

Materials

Boxwood and lignum vitae.

Measurements

570 mm (Width); 640 mm (Length)

Place of origin

London

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Collection

Snowshill Manor and Garden, Gloucestershire

NT 1338181

Summary

Backstaff (Davis Quadrant). Lignum vitae and boxwood. Two engraved scales, one on each arc. Engraved nonius on scale. Two vanes missing, one present. Inscribed on a wooden inset: 'IF Thos. Dutch Jany 20, 1746'. English. In notebook no.2, page 9 (1340945.2) Charles Wade refers to: 'Admiral 26. Davis Quadrant 1746. 'Made of Lignum Vitae and Boxwood. Arcs for scales. Inscribed 'TF Thos. Dutch Jany 20, 1746'.' Includes sketch with dimensions. See note for description of use by CPW.

Provenance

CPW Item 26 Given to the National Trust with Snowshill Manor in 1951 by Charles Paget Wade.

Marks and inscriptions

IF Thos. Dutch Jany 20, 1746

References

Wade, 1944: Charles Paget Wade, Contents of Snowshill Manor. Volume 2 The Admiral’s Room, 1944, page 9

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Place of origin

London (203253)

Materials

Lignum vitae (79)
Boxwood [buxus sempervirens] (748)
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Category

Scientific instruments (2076)

Collection

Snowshill Manor and Garden, Gloucestershire (16509)

Periods

18th Century (122558)

Object Type