
Go back to article: Review: Ships, Clocks & Stars: The Quest for Longitude
Figure 2

© Science Museum/Science & Society Picture Library
Hadley's quadrant, 12 inch with back sight, early 19th century.
Go back to article: Review: Ships, Clocks & Stars: The Quest for Longitude
© Science Museum/Science & Society Picture Library
Hadley's quadrant, 12 inch with back sight, early 19th century.