. Timber and some of its diseases. Timber; Trees. I.] GENERAL CHARACTERS AND STRUCTURE. 7 will be closer-grained, and heavier, than an equal volume of the wood where the thin-walled tracheides with large lumina Tig, of four annual rings from a thm transverse section of the wood of a Conifer, such as the spruce-fir. M, a medullary ray ,bmdc show the entire breadtu of two annual nngs. a, autumn wood of an annual rmg internal to 6 (and there- fore older than &), d, spring wood of an annual ring external to c ^d theretore younger than c) Bordered pits are seen in sect
. Timber and some of its diseases. Timber; Trees. I.] GENERAL CHARACTERS AND STRUCTURE. 7 will be closer-grained, and heavier, than an equal volume of the wood where the thin-walled tracheides with large lumina Tig, of four annual rings from a thm transverse section of the wood of a Conifer, such as the spruce-fir. M, a medullary ray ,bmdc show the entire breadtu of two annual nngs. a, autumn wood of an annual rmg internal to 6 (and there- fore older than &), d, spring wood of an annual ring external to c ^d theretore younger than c) Bordered pits are seen in section on some of the tracneiaes. Magnified about loo times Returning now to the section (Fig. 3), it is to be observed that the differences in the zones just referred to enable us to distinguish the so-called "annual. 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 Ward, H. Marshall (Harry Marshall), 1854-1906. London, Macmillan
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookpublisherlondonmacmillan
