—, shifting, [156]
Wood, acid processes, [69]
—, amount of bleaching powder needed by, [112]
—, bisulphite processes, [71]
—, boiling with sulphites, [74]
—, chemical, in paper, detecting, [200]
—, cutting up for pulp, [105]
—, grinding, [105]
—, mechanical, in paper, detecting, [200], [201]
—, objection to acid in bleaching, [112]