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Boyer's photographic studio, 1899. Family posing within a wooden framework with gauze-like material stretched over it. This produced an evenly diffused light when the magnesium flash on the top right of the framework was fired by pressing button on bulb at end of wire. The use of bright artificial light allowed exposure times to be reduced to a few seconds. From La Nature. (Paris, 1899). (KEYSTONE/HERITAGE IMAGES/Oxford Science Archive)