DARWIN CHAELES ROBERT

proved to be uncon genial, so he entered ate 5 the intention geologist, i through the former he Teceived the "i of naturalist for the expedition of HMLS. Beagle Pacit- | and | owing to his favorable pecuniary circumstances, he was enabled, in spite of persistent ill-health, to tion of one of the most far-reaching theories in history. He became more and more convinced, especially after reading Malthus On Population, that species were not immutable. After discu ing the problem with Asa Gray and his friends Lyell and Hooker, he prepared the e ay, On the Tendency of Speciez to Porm Varieties, de., which, together with an e ay by A. R. Wallace, who had independently arrived at the same conclusions, was read at a —— able meeting of the Linnean 1358. This communication, followed by the ogee in the following year, of On the Origin of Rpeses by Meanz of Natural Selection, or the Prezervation of Pazored Races in the Struggle for Life, aroused wild ent. and at the same time bitter opposition, and has research in every branch of including that of human conduct. The Variation of Animalz and Plants 1868: and The Vegetable Mould through the Action of Worms, 1881. See Evorurtion.