. Painting and painters' materials: a book of facts for painters and those who use or deal in paint materials . 2 Apple Birch Pear White beech Purple Box Cedar i-SOo Ebony Young oak Old oak Young ash Old ash Fir-wood Perhaps more satisfactory measurements have beenmade in Germany by Karmarsch, which are so valua-ble that we give them also in full. The Contraction of Wood, pAmount of Shrinking of Green Wood i?t Percentages. Cross Section. Ki
. Painting and painters' materials: a book of facts for painters and those who use or deal in paint materials . 2 Apple Birch Pear White beech Purple Box Cedar i-SOo Ebony Young oak Old oak Young ash Old ash Fir-wood Perhaps more satisfactory measurements have beenmade in Germany by Karmarsch, which are so valua-ble that we give them also in full. The Contraction of Wood, pAmount of Shrinking of Green Wood i?t Percentages. Cross Section. Kind of Wood. In length.* Directly In directiont through, f of yearly rings. to ... to to to to to to to to to to to to to to to to to to 0. no to to to to to to to to to * In line a to a. About i-io of i per cent. + In line of layers marked c. About 5 per cent, $ In line of z to /. About 10 per cent. lo Paifiting and Painter s Materials. It will be seen that the expansion of wood due tomoisture is from 5 times (in young ash) to 213 times(in ebony) greater in its breadth than in its would naturally expect, therefore, to find cracksin paint and varnish parting as the fibres of the woodpart—namely, parallel with its grain. The facts are that those cracks, extending with thegrain, are much less numerous and of less importancethan those extending across the grain. Within thehouse, or car, nearly all cracks run at right angles tothe grain of the wood. Out of doors, except withvery green wood or very poor materials, cracks ofmuch consequence do not appear in the wood untilthis has become dry and shrunken, and has expandedagain in some
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishernewyo, bookyear1883
