April, 1927 REDUCTION OF DI- AND TRIPHENYLAMINES ... [CONTRIBUTION FROM THE CHEMICAL LABORATORY OF THE UNIVERSITY OF ILLINOIS] THE CATALYTIC REDUCTION OF DI- AND TRIPHENYLAMINES WITH HYDROGEN AND PLATINUM-OXIDE PLATINUM BLACK. XV' BY GS HIERS AND ROGER ADAMS RECEIVED JANUARY 29, 1927 PUBLISHED APRIL 7, 1927 The catalytic reduction of certain aromatic amines by means of plati- num- ...