Pattern making; a practical treatise for the pattern maker on wood-working and wood turning, tools and equipment, construction of simple and complicated patterns, modern molding machines and molding practice (1921)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 19
and is more liable thanthe latter to warp and to be affected by moisture. Black walnut,beech, and maple are used to some extent. Black walnut is strongerthan cherr>% but, like beech and maple, is likely to warp. Warping of Wood. Observation shows that if one side of aboard is kept damp and the… … Fig. 1. Board Warped from Unequal F»g 2 Warping of Pile of Boardi Dr>nes3 as in the stack of boards shown in Fig. 2, the exposed side of theupper board will give off its moisture more rapidly than the otherside, and the board will warp or bend in the direction shown by thedotted lines. The…
Patternmaking
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