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Chemical Laboratories, Apparatus, 1700-1849 Wollaston slide rule of chemical equivalents, 1814

IMAGE ID
UIS5064873
Titre
Chemical Laboratories, Apparatus, 1700-1849 Wollaston slide rule of chemical equivalents, 1814
Lieu de conservation
Science Museum, London, UK
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object
Description

Chemical Laboratories, Apparatus, 1700-1849 Wollaston slide rule of chemical equivalents, 1814. William Hyde Wollaston (1766-1828) was a pioneer of powder metallurgy and discovered two new metals, rhodium and palladium. Wollaston developed this slide rule to enable calculations of chemical proportions (relative weight of reactants), using a logarithmic scale of chemical equivalents. Like most early 19th century chemists, Wollaston used equivalents rather than atomic weights in an attempt to avoid the various problems associated with the latter. Compounds and elements are marked on the outer scale. ©SSPL/Science Museum

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SSPL/UIG / Bridgeman Images
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