DRUMMOND, HENRY (1851-1897), Scottish evangelical writer and lecturer, was born in Stirling on Aug. 17, 1851. He was educated at Edinburgh university, and in 1877 became lecturer on science in the Free Church college, Glasgow. His principal work was Natural Law in the Spiritual World (1883), the argument of which was that the scientific principle of continuity extended from the physical world to the spiritual. In 1888 he published Tropical Africa, a valuable digest of information based on a visit to Africa in 1883. In 1890 he travelled in Australia, and in 1893 delivered the Lowell Lectures at Boston, which were printed in 1894 under the title of The Ascent of Man, in which he argued that the disinterested care and compassion of animals for each other played an important part in effecting "the survival of the fittest," a thesis previously maintained by Prof. John Fiske. Drummond died on March i i, See the Life by Sir G. A. Smith (1898).