Sir Horace Lamb (27 November 1849 – 4 December 1934) was a British applied mathematician and author of several influential texts on classical physics, among them Hydrodynamics (1895) and Dynamical Theory of Sound (1910). Both of these books remain in print. The word vorticity was invented by Lamb in 1916. Biography Early life and education Lamb was born in Stockport, Cheshire, the son of John Lamb and his wife Elizabeth, née Rangeley. John Lamb was a foreman in a cotton mill who had gained some distinction by the invention of an improvement to spinning machines, he died when his son was a child. Lamb's mother married again, and soon afterwards Horace went to live with his strict maternal aunt, Mrs. Holland. He studied at Stockport Grammar School, where he made the acquaintance of a wise and kindly headmaster in the Rev. Charles Hamilton, and a graduate of classics, Frederic Slaney Poole, who in his final year became a good friend. It was from these two tutors that Lamb acquired his interest in mathematics and, to a somewhat lesser extent, classical literature. In 1867, he gained a classical scholarship at Queens' College, Cambridge. Since Lamb's inclination, however, was to pursue a career in engineering, he chose to decline the offer, and instead worked for a year at the Owens College in nearby Manchester, as a means of developing his mathematical proficiency further. At that time, the Chair of Pure Mathematics at Owens College was held by Thomas Barker, an eminent Scottish mathematician, who graduated as Senior Wrangler and first Smith's prizeman from the Cambridge Mathematical Tripos in 1862. An acknowledged lecturer of high quality, Lamb prospered under the guidance of Barker, and was elected to a minor scholarship at Trinity College, Cambridge. At Trinity, he was Second Wrangler in the Mathematical Tripos, 2nd Smith's prizeman and elected fellow in 1872. Among his professors were James Clerk Maxwell and George Gabriel Stokes. He was soon elected both a Fellow and a tutor in the college. University of Cambridge, 1872–75 By 1874, Lamb had become thoroughly invested in his work at Trinity, preparing there an innovative and original series of lectures on the subject of hydrodynamics for third-year students. Richard Glazebrook, a final-year student at the time, wrote of them that they were 'a revelation', and praised Lamb for his lucid presentation of the properties of liquids in rotational motion. However, Lamb soon