Canadian wood products industries . ure content of wood on leaving the kiln is gen-erally from 2 to 6 per cent, lower than that of thor-oughly air-dried stock. Since wood rapidly increasesin strength with loss of moisture, higher strengthvalues may be obtained from kiln-dried than from air-dried wood. Such a difference in strength has nosignificance, since in use a piect of wood will cometo practically the same moisture condition whetherit is kiln-dried or air-dried. It must be emphasized that the appearance of thedried wood is not a reliable criterion of the effectthe drying process has had u
Canadian wood products industries . ure content of wood on leaving the kiln is gen-erally from 2 to 6 per cent, lower than that of thor-oughly air-dried stock. Since wood rapidly increasesin strength with loss of moisture, higher strengthvalues may be obtained from kiln-dried than from air-dried wood. Such a difference in strength has nosignificance, since in use a piect of wood will cometo practically the same moisture condition whetherit is kiln-dried or air-dried. It must be emphasized that the appearance of thedried wood is not a reliable criterion of the effectthe drying process has had upon its strength. Thestrength properties may be seriously injured with-out visible damage to the wood. Also, it has beenfound that the same kiln-drying process can not beapplied with equal success to all species. To insureuninjured kiln-dried material a knowledge of thecorrect kiln conditions to use with stock of a givenspecies, grade, and thickness, and a record showingthat no more severe treatment has been employed,are The middle crate is the most rigid ot the left hand crate posses-ses very little rigidity. I Canadian Woodworker and Furniture Manufacturer 6? % Machinery ^Equipment f A Glue Pot with Automatic Heat Control Almost all of our readers at some time or otherhave had difficulty in using glue because of the greatvariance in the flexibility of glue mainly due to un-even heating. Glue, like most other similar substan-ces has a certain point of temperature where it at-tains its greatest flexibility and viscosity. To securethis, thermostatic heat control has been recommendedbut there has been difficulty in producing a satisfac-tory, controlled heat, glue pot which is fully automat-ic and requires no personal attention. To fill these requirements, the Wallace bench gluepot, here illustrated, equipped with a reliable, fullyautomatic heat control device, has been are several exceedingly practical and interest-ing features incorporated in
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectfurnitu, bookyear1922
