Accession No

3020

Brief Description

wind chart for 60 PR gun, by J. H. Steward Ltd., invented and designed by Lieutenant S. T. Layon, English, 1/2 20th Century

Origin

England; London; Strand

Maker

J. H. Steward Layton, S. T. [designer]

Class

mathematics; military

Earliest Date

1900

Latest Date

1950

Inscription Date

Material

plastic (two types of celluloid); metal

Dimensions

length 205mm; width 155mm

Special Collection

Steward collection

Provenance

Collection purchased from member of the Steward family, 1974.

Inscription

‘WIND CHART
FOR
60 PR GUN’ (centre)
‘Invented & Designed by — Lieut. S. T. Layton C.G.A.’ (bottom)
‘J.H. STEWARD LTD. LONDON’ (top)

Description Notes

White celluloid rectangle with rotatable transparent celluloid wind rose. To the left and below the wind rose are scales for calculating required adjustments to range and line. Beneath the wind rose are concentric circles representing wind speed, marked every 10 from 0 to 80. Wind rose has 32 points marked (8 by initial) and degree scale divided [0] - 360, numbered by 10˚. At bottom instructions for use and table converting miles per hour into feet per second.

Condition good (some corrosion of metal pivot); complete.

References

Events