Noyes, William, 1862-1928 · Peoria, Ill. : Manual Arts Press · leaf 15
er with thick walls. A layer of springwood and of summer wood together form an annual ring as seenin a cross-section of a log, or stripes, as seen in a longitudinal sec-tion. Eunning across these up-and-down cells and radiating outfrom the center of the tree are other cells called pith rays,… … Fig-. 1. Boards usually warp in the di-rection opposite to that of the usual ringsin them. beauty to the grain of the wood. Now wood shrinks because thewalls of the cells which compose it become thinner as they dry.For some unknown reason wood cells do not become shorter, so thatwood shrinks very…
Woodwork
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