“…Concerning the theoretical base and the details of the practical management of the methylene-blue method, I refer to Thunberg (11,12) and Ahlgren (9,13,14) and to the forthcoming monography by Ahlgren on this subject (15). As to the results, I am going to give in the 17* tables the decolorisation times without recalculation in accordance with any formula.…”