. Canadian forest industries 1901-1902. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. P. G. Solid Mould. Hush mould, Bolection mould, also moulded on solid, as seen in section. Three-ply panels can be used, which, of course, are much stronger than ' most solid oods of the thickness. w DRYING LUMBER IN KILNS. By " ; There was a time when one thought he must Carry a stock of lumber sufficient for a year's (supply ahead in order to satisfy the trade. That seemed to fill the bill then, but the de- mand increased to such an extent that
. Canadian forest industries 1901-1902. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. P. G. Solid Mould. Hush mould, Bolection mould, also moulded on solid, as seen in section. Three-ply panels can be used, which, of course, are much stronger than ' most solid oods of the thickness. w DRYING LUMBER IN KILNS. By " ; There was a time when one thought he must Carry a stock of lumber sufficient for a year's (supply ahead in order to satisfy the trade. That seemed to fill the bill then, but the de- mand increased to such an extent that the Supply run short and there arose a demand for something to dry lumber quicker. From that time there has been a constant effort to develop <a system for drying lumber that shall be quicker and better than the old system, and dry-kiln builders have succeeded in making a wonderful showing in the matter. My object in writing on this subject is to show to some extent the different stages in dry-kiln building and their effect on lumber. In the first place, let me say I never worked nicer stock so far as drying was concerned than the lumber dried under a covered open shed. This stock was sometimes two years old. You could put a finish on it with a set of knives, without damage, while some of the artificially- dried stock will turn the edge of a knife in a few minutes, especially hard woods. I used to think this must be the result of a harder kind of wood than I was used to, but changed my mind, as I find the fault is in the drying. Why is lumber dried by the heat of a stove harder to cut than air-dried lumber? I studied the matter and kept experimenting and reading about the nature of wood, and found that wood is a complete network of pores or airholes through which the water evaporates. Where the lumber is dried out of doors, under cover, the process is so slow there is practically no change in these pores, giving the lumber a soft, light surface, while stock subjected to art
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectforests, bookyear1902
