image leybourn_w_on_dialling_1700_pl_023
Image number: RS.18015
Credit: ©The Royal Society

Sundial

Date

1690

Creator

Robert White (1645-1703, British), Engraver

Object type

Library reference

48603

Material

Technique

Dimensions

height (page): 290mm
width (page): 180mm

Subject

Content object

Description

A perpendicular stile is set up on a windowsill. A young man kneels to observe where the shadow falls as the sun hits the top of the stile, allowing him to record.

Plate 23 from William Leybourn’s Dialling: plain, concave, convex, projective, reflective, refractive… (Black Swan, Pater-Noster-Row, 1690)

William Leybourn (1626-1716) British mathematician and land surveyor was not a Fellow of the Royal Society.

Associated place

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