▁the ▁" G es ellschaft ▁zur ▁För der ung ▁der ▁Wissenschaft ▁des ▁Jud enth ums ", ▁which ▁held ▁its ▁first ▁meeting ▁in ▁Berlin ▁in ▁November ▁ 1 9 0 2 . ▁ ▁C ohen ▁edited ▁and ▁published ▁Friedrich ▁Albert ▁L ange ' s ▁final ▁philosoph ical ▁work , ▁Log ische ▁Studien ▁( Le ip zig , ▁ 1 8 7 7 ), ▁and ▁edited ▁and ▁wrote ▁several ▁versions ▁of ▁a ▁long ▁introduction ▁and ▁critical ▁supp lement ▁to ▁L ange ' s ▁Geschichte ▁des ▁Material ismus . ▁ ▁He ▁devoted ▁three ▁early ▁volumes ▁to ▁the ▁interpretation ▁of ▁Kant ▁( K ant ' s ▁Theory ▁of ▁Exper ience , ▁Kant ' s ▁Found ations ▁of ▁Eth ics , ▁and ▁Kant ' s ▁Found ations ▁of ▁A est het ics ). ▁ ▁In ▁ 1 9 0 2 ▁he ▁began ▁publishing ▁the ▁three ▁volumes ▁of ▁his ▁own ▁system atic ▁philosophy : ▁Log ik ▁der ▁re inen ▁Er ken nt nis ▁( 1 9 0 2 ), ▁Eth ik ▁des ▁re inen ▁Will ens ▁( 1 9 0 4 ) ▁and ▁Ä st het ik ▁des ▁re inen ▁Gef üh ls ▁( 1 9 1 2 ). ▁The ▁planned ▁fourth ▁volume ▁on ▁psych ology ▁was ▁never ▁written . ▁ ▁C ohen ' s ▁writ ings ▁rel ating ▁more ▁especially ▁to ▁J uda ism ▁include ▁several ▁pam ph lets , ▁among ▁them ▁" Die ▁Kult urg esch icht liche ▁Bedeutung ▁des ▁S abb at " ▁( 1 8 8 1 ) ▁and ▁" E in ▁Bek en nt