. Wood; a manual of the natural history and industrial applications of the timbers of commerce. Wood; Timber. CLASSIFICATION OF HARD-WOODS 45 compact, yellow wood, characteristically mottled with brown, with uniformly scattered vessels, may, perhaps, be classed here. ) 2. Without false rings. a. Soft, with no distinct heart. Silk-cotton, Bomhax, Mango, '^ Mangifera, etc. h. Harder, denser, usually with distinct heart. Siris, Albizzia Lebbek, Eng, Dipterocdrpus tuberculdtus, etc. (Compare Fig. 33, p. 47.) B. With distinct annual rings. j 1. Ring-porous: vessels in spring wood large or numerous,
. Wood; a manual of the natural history and industrial applications of the timbers of commerce. Wood; Timber. CLASSIFICATION OF HARD-WOODS 45 compact, yellow wood, characteristically mottled with brown, with uniformly scattered vessels, may, perhaps, be classed here. ) 2. Without false rings. a. Soft, with no distinct heart. Silk-cotton, Bomhax, Mango, '^ Mangifera, etc. h. Harder, denser, usually with distinct heart. Siris, Albizzia Lebbek, Eng, Dipterocdrpus tuberculdtus, etc. (Compare Fig. 33, p. 47.) B. With distinct annual rings. j 1. Ring-porous: vessels in spring wood large or numerous, those in summer wood small or few and scattered. a. Vessels in the spring wood larger. \. Fig. 31.—Transverse section of Common Ash (Frdxinus excelsior), photographed from nature. (i) Vessels in tree-hke or dendritic groups, or in circles, often scattered in the inner part of the rings. * Shghtly dendritic or concentric : pores in summer wood minute, regularly distributed, singly or in groups, or in short peripheral, but never radial lines. { Pith-rays minute, scarcely distinct. § Wood heavy and hard : vessels in summer wood not in clusters, or 2-4 together. (a) Heartwood not yellow in radial section ; con- tinuous zone of pores in spring wood. Ash, Frdxinus. Vessels in summer wood in peripheral 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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