. Wood; a manual of the natural history and industrial applications of the timbers of commerce. Wood; Timber. FUNCTIONS OF CONIFEROUS WOOD 23 of conifers, consisting, as it does, so largely of tracheids, it is these tracheids, communicating as they do by the bordered pits on their radial walls, that convey water and air from the roots to the leaves, though they also store up starch in autumn and winter. The pith- rays being elongated radially, retaining their protoplasm, forming. Fig. 18.—Transverse section of part of young stem of Oak, highly magnified. «&, pith ; c, cortex ; i, epidermis
. Wood; a manual of the natural history and industrial applications of the timbers of commerce. Wood; Timber. FUNCTIONS OF CONIFEROUS WOOD 23 of conifers, consisting, as it does, so largely of tracheids, it is these tracheids, communicating as they do by the bordered pits on their radial walls, that convey water and air from the roots to the leaves, though they also store up starch in autumn and winter. The pith- rays being elongated radially, retaining their protoplasm, forming. Fig. 18.—Transverse section of part of young stem of Oak, highly magnified. «&, pith ; c, cortex ; i, epidermis; h, periderm ; g, coUenchyma; r, spiral vessels forming protoxylem ; pv, pitted vessels (trachea3); sm. secondary pith-rays ; p, wood- parenchyma ; n, m, cambium; k, bast-fibres. (After Hartig, from The Oak, by per- mission of Professor Marshall Ward and Messrs. Kegan Paul, Trench, Trttbner & Co.) starch, and communicating through their pitted walls with phloem and even cortex as well as xylem, undoubtedly play an important part in the transfer of formative material from one part of the stem to another. When we examine the stem of a broad-leaved tree, such as an. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Boulger, George Simonds, 1853-1922. London, E. Arnold
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttimb, booksubjectwood
