The kiln drying of lumber; a practical and theoretical treatise . Fig. 28.—Wash boarding effect on a radially-sawed board of blue gum {Eucalyptus globulus).. Fig. 29.—Remarkable shrinkage of California blue gum compared with redwood. Allthese boards were originally the same width. (The one on the right is redwood.) HOWi WOOD DRIES 127 The shrinkage of wood in drying varies almostexactly in an inverse ratio with its moisture per , if plotted on cross section paper with moistureper cent, as an abscissa and width as an ordinate, thediagram forms a straight line from the fiber saturationp
The kiln drying of lumber; a practical and theoretical treatise . Fig. 28.—Wash boarding effect on a radially-sawed board of blue gum {Eucalyptus globulus).. Fig. 29.—Remarkable shrinkage of California blue gum compared with redwood. Allthese boards were originally the same width. (The one on the right is redwood.) HOWi WOOD DRIES 127 The shrinkage of wood in drying varies almostexactly in an inverse ratio with its moisture per , if plotted on cross section paper with moistureper cent, as an abscissa and width as an ordinate, thediagram forms a straight line from the fiber saturationpoint to zero per cent, moisture. The table (VII) on pages 129-131, which has beencalculated from United States Forest Service tests,*^gives the shrinkage from the green to the perfectly drycondition in the two directions across the grain and involume, in per cent, of the green dimension. The vol-ume was measured on two inch by two inch pieces, andthe radial and tangential on pieces two inches wide andfour inches long in the direction measured. Theweights per thousand board feet of lumber, exactly oneinch thick when green, are also given for the gree
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Keywords: ., bookcentury1900, bookdecade1910, bookidkilndry, booksubjectlumber
