EISLER, RUDOLF (1873-1926), German philosopher, was born on Jan. 7, 1873, at Vienna, and was educated at Leipzig, where he continued to reside. The influence of Kant and the 19th century idealistic thinkers, and the spiritualistic dynamism of his metaphysics colour his works, the chief of which are : De W eiter bildung der Kantschen Aprioritatslehre (1895) ; Grundlagen der Phil. des Geisteslebens (1908) ; Geschichte des Monismus (191o) ; Geist and Korper (1912; 2nd ed., 1925); Der Zweck Eisler has also translated various philosophical works and com piled W orterbuch der philos. Begriffe (1899; 4th ed., 192 7) ; Philosophen-lexicon (1912) and Handworterbuch der Philosophie (1913 ; 2nd ed., 1922).