Chemistry of pulp and paper making . Fig. I Drawings of Wood-elements 1-7. Avicennia sp. i. Wood-parenchyma cells; tangential section. 2. Sep-tum of a duct. 3,4, s- Conjugate wood-parenchyma cells. 6, 7. Portions ofspirally striated libriform fibres. 8-11. Bast cells of Cytisus laburnum. through young bast bundle acted on by chloroiodide of zinc. 9, 10,II. Cross-sections through young bast cells similarly treated. 12. Porlieriahygrometrica; radial section of conjugate substitute fibres. 13. Jatropha mani-hot, radial section through wood. 14-18. Tectona grandis; elements separat
Chemistry of pulp and paper making . Fig. I Drawings of Wood-elements 1-7. Avicennia sp. i. Wood-parenchyma cells; tangential section. 2. Sep-tum of a duct. 3,4, s- Conjugate wood-parenchyma cells. 6, 7. Portions ofspirally striated libriform fibres. 8-11. Bast cells of Cytisus laburnum. through young bast bundle acted on by chloroiodide of zinc. 9, 10,II. Cross-sections through young bast cells similarly treated. 12. Porlieriahygrometrica; radial section of conjugate substitute fibres. 13. Jatropha mani-hot, radial section through wood. 14-18. Tectona grandis; elements separatedby maceration. 14. Conjugate wood-parench3fma cells. 15. Ordinary wood-parenchyma fibre. 16. Substitute fibre. 17. Libriform fibre. 18. Septate libri-form fibre. WOODS 47. Fig. 2. Drawings of Wood-elements 19. TracheidfromTectonagrandis. 20-23. Porlieria hygrometrica. 20. Con-jugate substitute fibres in cross section. 21. Ordinary substitute fibre aftermaceration. 22, 23. Conjugate substitute fibres after maceration. 24-27. Cy-tisus laburnum; elements after maceration. 24. Wood-parenchyma fibre. 26. Substitute fibre. 27. Simple libriform fibre. 28. Cross-sectionthrough cambium and youngest wood of Cytisus laburnum. 29, 30. Mahoniaaquifolium; ducts. 29. After maceration. 30. Longitudinal section. of ducts separated by maceration from Hieracium. 37-39. Ductsfrom Onopordon acanthiurn. 40. Spirally marked duct from Vitis vinifera. fibre from Jatropha manihot. 48 FIBROUS RAW MATERIALS
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1920
