Details
Image number
UIS5065290
Title
Chemical Laboratories, Apparatus, 1700-1849 Wollaston's chemical slide rule, c 1820
Location
Science Museum, London, UK
Medium
object
Description
Chemical Laboratories, Apparatus, 1700-1849 Wollaston's chemical slide rule, c 1820. Made in boxwood by Dring and Fage of Tooley Street, London. William Hyde Wollaston (1766-1828), the English chemist, was a pioneer of powder metallurgy and discovered rhodium and palladium. He developed the 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
Photo credit
SSPL/UIG / Bridgeman Images
Keywords
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