Professor of natural philosophy at the Royal Institution between 1853 and 1887, the physicist and mountaineer John Tyndall (1820–93) passionately sought to share scientific understanding with the Victorian public. A lucid and highly regarded communicator, he lectured on such topics as heat, light, magnetism and electricity. In this collection of twelve lectures, first published in 1863, Tyndall discusses the general properties of heat and its associated physical processes, such as convection, conduction and radiation. He presents concepts so that they are intelligible to non-specialists, and helpful illustrations of laboratory equipment accompany his descriptions of experiments and phenomena. Throughout, he explains the research and discoveries of renowned scientists, including Sir Humphry Davy, Julius von Mayer, James Prescott Joule, and Hermann von Helmholtz. Several of Tyndall's other publications, from his lectures on sound to his exploration of alpine glaciers, are also reissued in this series.