The attention of the authors was attracted to auramine because of its use as an antiseptic under the name of Pyoktanium Aureum, for the treatment of infections. Fairbrother and Renshaw2 chose auramine as the most powerful bactericide in a large number of dyes tested. Dyson3 states-“Auramine is probably the most potent antiseptic dyestuff known (with the exception of the cyanine dyes), and one which is, moreover, very general in its action. ...