1875. Lwów, Ksiegarnia Polska, 1875-1876. 8vo. In contemporary half cloth with gilt lettering to spine. Previous owner's stamp and another owner's sginature to title-page. Light wear to extremities, otherwise a fine and clean set. 262, (2); 313, (3) pp. Rare first Polish edition of the second and third parts of the Descent of Man, but published separate from the first part, as one work, hence the title 'Sexual Selection', a translation authorised by Darwin in response to Malowski's request to make the translation (Letter 8910, 14 May 1873). Whereas "Origin of Species" established Darwinism as a turning point in nineteenth-century biology "The Descent of Man" helped built a bridge between biology, the social sciences, and the humanities and made Darwinism a broad system of research designs, theoretical principles, and philosophical outlook.The numeration of parts is from Chapter I to Chapter VI (vol. I) and from Chapter VII to Chapter XIV (vol. II). It is generally based on the…