A shorter course in woodworking; a practical manual for home and school . Fig. 536 Fig. 537 Fig. 538 the splitting is sure to be in the Hne of the fibres, thus avoiding cross-grain. Well-seasoned wood is necessary for nicework, to prevent cracks, warping, opened joints,and often the entire ruin of the article. It isnot easy for the beginner to decide whetherstock is properly seasoned, except in case ofvery green wood, which is of course wet andsoggy. Much stock sold as dry is not thor-oughly seasoned and care should be taken inbuying. Two ways of drying wood are com-mon. One is the old-fashion
A shorter course in woodworking; a practical manual for home and school . Fig. 536 Fig. 537 Fig. 538 the splitting is sure to be in the Hne of the fibres, thus avoiding cross-grain. Well-seasoned wood is necessary for nicework, to prevent cracks, warping, opened joints,and often the entire ruin of the article. It isnot easy for the beginner to decide whetherstock is properly seasoned, except in case ofvery green wood, which is of course wet andsoggy. Much stock sold as dry is not thor-oughly seasoned and care should be taken inbuying. Two ways of drying wood are com-mon. One is the old-fashioned method (usual-Fig. 539 ly known as seasoning, or air-drying) in which Although boards cut through or near the middle are, as a rule, the best, when theycontain the pith they are sometimes valueless in the centre, as when, in the case of an oldtree, decay has begun at that 2o6 A Shorter Course in Woodworking the wood is gradually seasoned by exposure to the air (but protected fromthe weather). The second way is that ordinarily used. To save time andmoney, the wood is dried in a closed room by steam or other heat (calledkiln-drying) much more quickly than by the old way. By the natural air-drying process the moisture slowly works out tothe surface and evaporates, until the wood is seasoned, though neverabsolutely dry, and the stock is firmer, more elastic, and less affected byheat and cold, moisture and dryness, than if kiln-dried. The latter processtends to dry the outside and ends of the lumber too fast for the certainly lessens the elasticity of the wood and weakens its it is at once protected from dampness in some way, it will reabsorbmoisture until it gets into a more natural condition^; but that will not fullyrestore its elasticity. Hard woods ^ should first be air-dried for some months at least, beforebeing put into a kil
Size: 1581px × 1581px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorklondongpput
