Pyramid dial Robert White
Product images of Pyramid dial
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.
- Image reference: RS-18015
- ©The Royal Society
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Manufactured in the UK
All products are printed in the UK, using the latest digital presses and a giclée printmaking process.
We only use premium branded inks, and colours are independently verified to last between 100 and 200 years.