On the relative photogenic or illuminating value of vegetable, animal, and mineral oils, and coal gas / by Stevenson Macadam.

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On the relative photogenic or illuminating value of vegetable, animal, and mineral oils, and coal gas / by Stevenson Macadam. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.