4 0 c m
29cm
actual image size: 21cm x 32cm
Description
Ivory diptych sundial for latitude 47 degrees made by Hanns Troschel, with vertical and horizontal dial, pin gnomon for Italian & Babylonian hours, lunar volvelle and wind pose. Wind vane, compass needle and cover glass missing.
Image Details
Image Ref.
10456833
© Science Museum / Science & Society Picture Library