William Hyde Wollaston. Engraving of William Hyde Wollaston (1766-1828),English chemist,the discoverer of palladium and rhodium,and a pioneer of powder metallurgy. In 1800,having given up a medical practice,he earned a living from the sale of platinum and was able to devote his time to studying chemistry and optics. While working with crude platinum ore he discovered palladium (1802) and rhodium (1804). He also pioneered powder metallurgy,the use of heat and pressure to convert powders into metal articles. Wollaston made a number of contributions to science including a reflecting goniometer (for measuring crystal angles) and an improved microscope | |
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