19th Century
Born: London (England), 1824 
Died: Hindhead (England), 1904
Williamson became interested in chemistry through his medical education at Heidelberg (Germany). He studied under Graham and Liebig. He was appointed as professor of chemistry at the University College in London (1849). His discovery of the structure of alcohols and ethers gave him the ability to classify organic compounds into types according to structure. He formulated the concept of dynamic equilibrium of a reaction and demonstrated the catalytic action of sulphuric acid in the synthesis of ether from alcohol.