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Historical scales, wood engravings, published in 1880Historical scales from the 19th century (from top left to bottom right): Spring balance, Decimal balance, Steelyard, Chemical balance, Beam balance. Wood engravings, published in 1880
Robert Bunsen (1811-1899), wood engraving, published in 1880Robert Wilhelm Eberhard Bunsen (1811 - 1899), German chemist. He developed together with Gustav Kirchhoff the spectral analysis by means of which chemical elements can be detected with high