—, Roeckner’s, [181]

—, Porion’s, [182]

—, smell consumer, [183]

—, Yaryan, [231]

Felting, [31]

— caused in potchers, [113]

Fermentation, cellulosic, [16]

Ferments decomposing cellulose, [15]

Ferric oxide causticising process, [232]

Fibre bundles, [34]