David Brewster
![Brewster, c. 1824](https://upload.wikimedia.org/wikipedia/commons/4/47/David_Brewster_1618.jpg)
Brewster was a pioneer in photography. He invented an improved stereoscope, which he called "lenticular stereoscope" and which became the first portable 3D-viewing device. He also invented the stereoscopic camera, two types of polarimeters, the polyzonal lens, the lighthouse illuminator, and the kaleidoscope.
Brewster was a devout Presbyterian and marched arm-in-arm with his brother during the events of the Disruption of 1843, which led to the formation of the Free Church of Scotland. As a historian of science, Brewster focused on the life and work of his hero, Isaac Newton. Brewster published a detailed biography of Newton in 1831 and later became the first scientific historian to examine many of the papers in Newton's ''Nachlass''. Brewster also wrote numerous works of popular science, and was one of the founders of the British Science Association, of which he was elected president in 1849. He became the public face of higher education in Scotland, serving as Principal of the University of St Andrews (1837–1859) and later of the University of Edinburgh (1859–1868). Brewster also edited the 18-volume ''Edinburgh Encyclopædia''. Provided by Wikipedia
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