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Science, engineering, and mathematics — biology, chemistry, physics, astronomy, earth sciences, social sciences, and technology research. A curated gateway to academic and professional scientific resources.
57129 resources
Transcript of a talk given at the Science Museum of The University of Coimbra. Includes photos of ancient devices.
An overview from the PBS show "The Search for Longitude".
The evolution from the earliest instruments to the sophisticated devices used today described and illustrated.
Illustrated article including details about dating. Links to antique instruments offered for sale.
Describes 17th and 18th century use of eclipses of Jupiter's moons to identify position.