. American forestry. Forests and forestry. THE FOREST PRODUCTS LABORATORY Wood distillation pressure treatment has over the sim- pler and far less expensive open tank process. The theory is, and there is no reason to doubt its correctness, that the deeper the preservative is forced into the wood the less will be the op- portunity for fungi to enter. Those who cannot use this elaborate treat- ment, however, need not despair, for there is known to be great value in open tank treatment, or even in the ap- plication with a brush of good pre- servatives. WOOD DIS I ILLATION Alcohol, turpentine, woo
. American forestry. Forests and forestry. THE FOREST PRODUCTS LABORATORY Wood distillation pressure treatment has over the sim- pler and far less expensive open tank process. The theory is, and there is no reason to doubt its correctness, that the deeper the preservative is forced into the wood the less will be the op- portunity for fungi to enter. Those who cannot use this elaborate treat- ment, however, need not despair, for there is known to be great value in open tank treatment, or even in the ap- plication with a brush of good pre- servatives. WOOD DIS I ILLATION Alcohol, turpentine, wood creosote, and acetates are the present best known products of wood distillation. It is the task of this section to conduct experi- ments to determine what products of tliis kind can be secured from dififerent woods, and the best processes for ob- taining them ; to study the design and operation of machinery best adapted for the production of these by-products so that they can be produced most eco-- 398 nomically, both as to quantity and qual- ity, and to study the refining of crude products. It is obvious to anyone who has noted the development of these in- dustries that here is a large field for the utilization of much material that now is wasted. Already, great advances have been made, and there is no ques- tion in anybody's mind that greater still are not far distant. The species to be first studied are southern i^ine, Douglas fir, Norway pine, and other resinous woods. Al- ready the ])ro(lucts that can be obtained from these woods are known, but there is greater room for improvement in the methods of production and refining. The distillation of dififerent hardwoods will also be studied. Slabs, sawdust, stumps, and all forms of mill and forest waste are material for such a laboratory as this. The equipment includes a steam dis- tillation and extraction retort; one oil- jacketed destructive distillation retort, and three product continuous refining .•^till and accessory a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
