Smoothers, [158]
Smoothness, [159]
Soaking wood, [107]
Soap, analysing, [208]
— and gelatine, [163]
— for paper-makers, [163]
Soda, action on cellulose compared with bisulphite, [76]
— ash, analysing, [205]
— bicarbonate for accelerating action of bleaching powder, [112]
—, brands, [178]