Oxidising sodium sulphide, [191]

Oxycellulose, [13]

Oxygen and cellulose, [10]

Oxygenating liquors while causticising, [191]

Paper ash, estimating, [134]

—, broke, pulp from, [104]

—, colouring, [141]

— from mechanical wood pulp, faults of, [108]

—, hand-made, [144]

—, loading, [130]