Strengths of alum solutions, table, [143]
— of paper, classification, [197]
— —, influence of glazing, [198]
— —, measuring, [193]
Sugar-cane fibre, [59]
Sulphide processes, economy of, [68]
— —, malodours of, [68]
Sulphite processes, objection to, [75]
Sulphur, action on cellulose, [130]
— and lime for neutralising bleaching powder, [129]