Scientific American 45, 27.7.1850
M. Deittmer has published in the Hanoverian Magazine, the following description of a compound metal, invented by Professor Hermstadt: - Take of pure platina 16 parts, copper 5, and zinc 1; put them in a crucible, and cover them with powdered charcoal, and keep over the fire until they are entirely melted into one mass. This compound is stated to be not only the same colour as gold, but likewise equal to it in density (sp. gr.) and also in ductility.