Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 50
In converting timber into planks orboards the shrinkage and warping to beexpected in use depend upon what part ofthe tree the piece is cut from. Practically,the stuff will only shrink along the curvedlines of the annual rings, and not from theoutside towards, the centre ; so that, a treebeing cut… … v^ Fig. 137.—Converting Pitchpine Logs into Boardsto show the Grain. angled on the other two, as in Fig. 134: Inthe conversion of fir, the old system isshown at Fig. 135, which is objection-able on account of the centre deal contain-ing the pith enclosed, and being thereforemore subject to dry rot.…
Carpentry · Joinery
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