Dalziel Llewellyn Hammick FRS (8 March 1887 in West Norwood, London, England – 17 October 1966) was an English research chemist. His major work was in synthetic organic chemistry. Along with Walter Illingworth he promulgated the Hammick-Illingworth rule, which predicts the order of substitution in benzene derivatives. He also developed the Hammick reaction which generates ortho-substituted pyridines.D. L. Hammick at cartage.org The Biographical Dictionary of Scientists: Chemists. ed. David Abbott (Peter Bedrick Books, New York, 1983)
