3 4 c m
40cm
actual image size: 32cm x 26cm
Description
Sextants like this one signed by Ramsden were used by army personnel and road builders for making military maps and surveying land for roads and railways. Jese Ramsden (1735-1800) was one of the top ten specialist instrument makers in 18th century England, supplying large-scale astronomical and surveying instruments both at home and abroad.
Image Details
Image Ref.
10279303
© Science Museum / Science & Society Picture Library