William Hyde Wollaston
- For the English philosophical writer, see William Wollaston.
William Hyde Wollaston (August 6, 1766 – December 22, 1828) was an English chemist who is famous for discovering two chemical elements and for developing a way to process platinum ore.
Life
He was born in East Dereham, Norfolk, the son of the priest-astronomer Francis Wollaston (1737-1815) and his wife Mary Farquier. In 1793 he obtained a doctorate in medicine from Cambridge University. During his studies there he became interested in chemistry, crystallography, metallurgy and physics. The mineral Wollastonite is named after him. In 1800 he left medicine and concentrated on pursing these interests instead of his trained vocation.
Work
Wollaston is perhaps best known as a chemist. He became wealthy by developing the first physico-chemical method for processing platinum ore in practical quantities, and in the process of testing the device he discovered the elements palladium (symbol Pd) in 1803 and rhodium (symbol Rh) in 1804. In 1809, he showed that niobium and titanium were elements (rather than compounds).
He also performed important work in electricity. In 1801, he performed an experiment showing that the electricity from friction was identical to that produced by voltaic piles. During the last years of his life he performed electrical experiments that would pave the way to the eventual design of the electric motor. However, controversy erupted when Michael Faraday, who was undoubtedly the first to construct a working electrical motor, refused to grant Wollaston credit for his earlier work.
His optical work was important as well, where he is remembered for his observations of dark Fraunhofer lines in the solar spectrum (1802) which eventually led to the discovery of the elements in the Sun. He also invented the camera lucida (1807), the reflecting goniometer (1809), and the Wollaston prism.
He used his Bakerian lecture in 1805, On the Force of Percussion, to defend Gottfried Leibniz's principle of vis viva, an early formulation of the conservation of energy. He was too ill to deliver his final Bakerian in 1828 and dictated it to Henry Warburton who read it on November 20.
He also served on a royal commission that opposed adoption of the metric system (1819), and one that created the imperial gallon.
Honours
- Fellow of the Royal Society, 1793;
- Secretary, 1804-1816;
- President, briefly in 1820.
- Royal Medal, 1828;
- The Wollaston Medal is named for him.