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Mathematical model to illustrate crystal formations on a triangular base, of cardboard covered plaster of Paris in colours, made by Alexander Crum Brown, Professor of Chemistry at the University of Edinburgh, c. 1880
Mathematical model / crystal formation
Crum Brown, Alexander, 1838 - 1922
Edinburgh, Midlothian, Scotland, Northern Europe
Cardboard covered plaster of Paris, coloured red, blue, yellow and green