The composition of some vegetable fibres with particular reference to jute

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Abstract
Vegetable fibers of many types fall into 2 well-defined groups, according to whether the cellulose of the fiber is low or high in xylan: (1) low in xylan, includes the high grade fibers such as flax, ramie and Italian hemp; (2) high in xylan, consists of fibers of the coarser type, such as jute, manila hemp and sisal, all of which contain appreciable amounts of lignin and encrusting hemi-celluloses. No direct relationship between quality and xylan content was found in a wide range of jute samples. The resistance or susceptibility of isolated cellulose to such treatments as boiling with dilute alkalies cannot be deduced from the xylan content, owing to the presence of varying amounts of easily extractable hexosan.