. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. Pulp mill and log pond. bamboo are the chief materials now used which are not the wastes of other industries. All plants are made up of certain definite chemi- cal constituents, among which are fats, tannins, lignin, pectose, coloring matters, sugar, starch and cellulose, and, when treated with certain chemicals, according to established methods, a more or less pure cellulose i
. Cyclopedia of farm crops : a popular survey of crops and crop-making methods in the United States and Canada. Agriculture -- Canada; Agriculture -- United States; Farm produce -- Canada; Farm produce -- United States. Pulp mill and log pond. bamboo are the chief materials now used which are not the wastes of other industries. All plants are made up of certain definite chemi- cal constituents, among which are fats, tannins, lignin, pectose, coloring matters, sugar, starch and cellulose, and, when treated with certain chemicals, according to established methods, a more or less pure cellulose is obtained ; and it is on the amount, fibrous nature, softness and pliability of this cellu- lose that the paper-making value of the plant chiefly depends. Classification of materials. With regard to the quality and value of the paper produced, the chief materials may be classi- fied in four general groups: (1) Cellulose from cotton, flax, hemp and ramie; (2) cellulose from jute, manila and chemical wood ; (3) cellulose from esparto and straws ; (4) ground wood. From the consideration of the nature and the percentage of cellulose in the materials they are classified as, (a) simple cellulose : cotton, containing 91 per cent of cellulose ; [b) pecto-cellulose : flax, cellulose 82 per PAPEPv PLANTS cent; hemp, cellulose 77 per cent; ramie, cellu- iQse 76 per cent; Sunn hemp, cellulose 80 per cent; manila, cellulose 64 per cent; bamboo, cellulose GO per cent; sugar-cane, cellulose 50 per cent; straw, cellulose 46 per cent; esparto, cellulose 48 per cent; adansonia, cellulose 49 per cent; (c) ligno- cellulose: New Zealand hemp, cellulose 86 per cent; jute, cellulose 64 per cent; pine, cellulose 57 per cent; poplar, cellulose 53 per cent. Classification of papers. With regard to the uses to which they are put, papers are divided into several classes: (1) Writing paper, embracing what are known as bond, ledger, record, linen, bank note, ordinary writing and envelope papers. These are
Size: 1355px × 1844px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookidcyclopediaoffarm00bailuoftbookyear1922
