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Stereoscope, known as Brewster stereoscope

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made in Paris

Stereoscope, known as Brewster stereoscope
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A Brewster stereoscope, named after its inventor David Brewster, is a device through which a stereo pair of photographs mounted on a card is viewed through two lenses. This example was made by Duboscq-Soleil, a firm of Parisian instrument makers.

The walnut-veneered stereoscope has an adjustable mirror and opaque ground glass screen. The body is stamped underneath with `DS` monogram (for Duboscq-Soleil) surrounded by `BREVETE / S.G. du GT`.

'S.G. du GT.' stands for 'sans guarantie du gouvernemente' and was a legal requirement for a French patent. The firm of Jean-Baptiste Soleil (1798-1878) and his son-in-law Jules Duboscq (1817-86) was famous for its optical instruments.

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