“…We employed the immediate-coagulation method of combined tanning with silver nitrate-10%, tannic acid 10%, and gentian violet 1% aqueous solution, as described by Dennison (1939). Tannic acid has been used successfully, with various modifications in technique, in the present war (Cohen, 1940a;Gordon, 1940;Heggie and Heggie, 1940;Brown, Dennison, Ross, and Divine, 1940;Ross and Hulbert, 1940).…”