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In the 16th century the English physician William Gilbert used a terrella made out of lodestone (a naturally-occurring magnetized mineral) to demonstrate that the earth is magnetic
Exterior scene showing a front view of the 7 foot equatorial sextant with a telescopic sight designed for the old Royal Observatory by John Flamsteed (1646-1719) the first Astronomer Royal
or The Luggage Question'
View of Drapers' Almshouses in St George's Fields
Behind his right elbow is a small collection of upright books
Lower Manhattan and Skyline Size:XS: 40 x 30cm In the 16th century the
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