. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. ) Larch, tamarack (Larix) Fir (balsam and others) (Abies) Spruce (Picea) Cedar (Chamcecyparis, Juni- perus, Cupressus, Thuja)Pine (Pimis)Hemlock (Tsuga)Cypress (Taxodium)Douglas fir (Pseudotsuga).etc. Birch (Betula)Beech (Fagus)Maple (Acer)Poplar (Popuhts)Chestnut (Castanea)Gum (Nyssa)Basswood (Tilia)Tulip (Liriodendron)etc. Resinous orconiferous Non-resinous or broad-leaf §1 PROPERTIES OF WOOD 3 come from cordage or rough textile waste. Esparto is a grassthat grows in Spain and Northern Africa; it is cut
. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. ) Larch, tamarack (Larix) Fir (balsam and others) (Abies) Spruce (Picea) Cedar (Chamcecyparis, Juni- perus, Cupressus, Thuja)Pine (Pimis)Hemlock (Tsuga)Cypress (Taxodium)Douglas fir (Pseudotsuga).etc. Birch (Betula)Beech (Fagus)Maple (Acer)Poplar (Popuhts)Chestnut (Castanea)Gum (Nyssa)Basswood (Tilia)Tulip (Liriodendron)etc. Resinous orconiferous Non-resinous or broad-leaf §1 PROPERTIES OF WOOD 3 come from cordage or rough textile waste. Esparto is a grassthat grows in Spain and Northern Africa; it is cut especially forpulp making. All the foregoing are discussed in detail the Sec-tion on Preparation of Rags and Other Fibers in Vol. IV. Withthe exception of wood and the plants just mentioned, the fibersof the other plants listed in Table I are used only to a very slightextent or are not used at all at the present time. Althoughsome of these plants yield an inferior pulp, the main reason whythey are not utilized to a greater extent is because they yieldsuch a small percentage of & 7> <u o » 11 Fig. 1.—Cross Section of Part of Indian Corn Stem. X 20. (Prepared by the Forest Products Laboratories of Canada.)In this and similar plants, the only parts of value for paper pulp are the bast fibers B,which show as the darkest parts of the bundles F. The thin-walled parenchyma, or pithcells P, which make up the most of the stem, are of little or no value. 3. Structure of Stem of Indian Corn.—In Fig. I1 is shown across section of the stem of Indian corn, from which may beestimated the relative amount of useful fiber and useless or 1 Figs. 1-3, 5-8, 11-13, and 16-22, inclusive, are reproductions of veryexcellent photomicrographs prepared by the Forest Products Laboratoriesof Canada, to whom special thanks are extended; we particularly wish tothank Air. J. D. Hale, of the Forest Products Laboratories of Canada. 4 PROPERTIES OF PULP WOOD §1 waste material; this figure may
Size: 1662px × 1504px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1921
