Sulphuric acid and cellulose, [12]
— — and ligno-cellulose, [22]
— — in bleaching pulps, [112]
Sulphurous acid for isolating cellulose, [64]
— — processes for wood, [70]
— — processes, objection to, [75]
Sunda, see Sunn hemp.
— —, characters, [50]
— —, composition, [50]