SIR JOHN FREDERICK WILLIAM (1792-1871).-_S._ of Sir William H., the eminent astronomer and discoverer of the planet Uranus, was _b._ at Slough, and _ed._ at Camb., where he was Senior Wrangler and first Smith's prizeman. He became one of the greatest of English astronomers. Among his writings are treatises on Sound and Light, and his _Astr