When, in the early phases of the N-ar, the number of burn casualties made the treatment of this group of lesions a problem of considerable importance, the need for an agent in the surface therapy of burns w-hich would meet the 4 following criteria was pointed out to those engaged in the plasma fractionation program:1. It should lack the deleterious effect on healing possessed by the conventional escharotics (1 to 3).2. It should possess properties of high stabilitv and low bull from the standpoint of transportation.3. It shoulcl be susceptible of simple and speedy application.4. It should possess requisite mechanical properties to permit immediate mobilizatioin of casualties under field conditions. At this time it became apparent that large quantities of purified human fibrinogen and thrombin were becoming available through the