The kiln drying of lumber; a practical and theoretical treatise . re is a difference in theamount of shrinkage between heartwood and sapwood,boards containing both are very apt to warp in quarter-sawed board, for this reason, will tend tobend sickle-shape. Thus radially-cut boards of redgum containing heartwood on one edge and sapwoodon the other will bow outwardly in drying. The amount of shrinkage in a piece of wood is nota constant factor, but it varies with the manner inwhich the wood dries. Thus, when dried slowly at hightemperature and high humidity, wood shrinks much HOW WOOD D
The kiln drying of lumber; a practical and theoretical treatise . re is a difference in theamount of shrinkage between heartwood and sapwood,boards containing both are very apt to warp in quarter-sawed board, for this reason, will tend tobend sickle-shape. Thus radially-cut boards of redgum containing heartwood on one edge and sapwoodon the other will bow outwardly in drying. The amount of shrinkage in a piece of wood is nota constant factor, but it varies with the manner inwhich the wood dries. Thus, when dried slowly at hightemperature and high humidity, wood shrinks much HOW WOOD DRIES 129 a a a b^ B ft -IOOOc0050-^?*?*^-l^3(^^vOl-HTi^lCr^^t>. a o I I ^—4 ^>4 v-4 ^-4 OCOCOi-iOOC^COi-H050S^C001>^_NCO(NT!<C^Tjri< M-«t5 u-1 O 0) OOOOOOOOOOOOOOOOOOOQOOOO ^Oi-tOSGOt^OOOOOOOOlOSlOrHr^i-C^lCCOC^JOCCO -*iMeocOi-iT-(T-<eo(MeocO-Hi-iT-i(NC<ic<ieoiN(N(Nc«3c<5coeo o o * ?>**»cioecfoeoioiooiccccQcO^eC<i<u3-«ti^^<ocDi©o fl fl C3 fl . m o <n d d d c5,2-^.22 §. PhphCh c3 • d (S-t3 03 03ii ^ O CQ tn CO o o o . dC S .Q c3 03 3 S3 l-l >-( tH I- fl ^ :3 o o o o p ;^ i3 S w w w M 05 0) ?f • • o o 44 oj m o o >, d d 3>>d||^^^^^-:igi^| ^-^ »H t< V. Si t< to 02 Kl CO 03 CS dJ ( 3 3 3j3,d SJrd ?- -ZL^L^L^U^ 130 THE KILN DRYING OF LUMBER 05-*O00OCOC0O>O^00C<I00t^»-<i-H0THi-H00r^(NCoio5o6odooo6c5c6oi0i05 -t^t-ot^oo^dododiooioiO OC0O-*^OC^^»OT-^(^0^-^0qc0p(^^0il00qTHTl^l^^r-^C0-<^^0T^ ,-t i-( I—( 1—I Y—I 1-* 1—I tH 1—1 r-( I—I 1-H rH rH I—I tH rH T-( 1—1 r-l i-H t-H r-l i—I t—I i—I i—I C^ i—t rH i—I
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Keywords: ., bookcentury1900, bookdecade1910, bookidkilndry, booksubjectlumber
