LAMB, SIR HORACE (1849-1934), English mathematician, was born at Stockport on Nov. 27, 1849. He was educated at Owens college and Trinity college, Cambridge, where he was second Wrangler and second Smith's Prizeman. In 1872 he was made a fellow and assistant tutor of Trinity college, in 1875 pro fessor of mathematics in Adelaide university, and in 1885 professor of mathematics in Manchester university, from where he retired in 192o. He became the recognized authority on hydro dynamics, publishing the Mathematical theory of the motion of fluids (Camb. 1878) and Hydrodynamics (Camb. 1895, 5th edition 1924), the standard work on this subject, to successive editions of which Lamb added results of his further researches. He has written many papers, principally on applied mathematics, his researches including, besides hydrodynamics, wave propa gation, the elastic deformation of plates and shells, and electrical induction. (See London Math. Soc. Proc., Roy Soc. Proc., Phil.
Mag., Trans. Camb. Phil. Soc., Manchester Phil. Soc. Memoirs.) On questions concerning the motions of the air involved by flying-machines, he has given valuable assistance to the Aero nautical Research committee. Lamb was made fellow of the Royal Society in 1884, and vice-president of the society in 19o9 and 1920-22. He was awarded the Royal medal in 1902 for his researches in mathematical physics, and the Copley medal in 1923. He was president of the British Association in 1925. He was knighted in 1931.
His other publications include : Infinitesimal Calculus (Cam bridge 1897, 3rd ed. 1926) ; Dynamical theory of sound (191o, 2nd ed. 1925); Statics: including hydrostatics and elements of the theory of elasticity (Camb. 1912, znd. ed. 1924) ; Dynamics (1914, 2nd ed. 1923) ; Higher mechanics (1920).