Abstract
IN an article on ground-line treatment of standing poles (Bell Lab. Rec., 22, No. 11; July 1944), C. H. Amadon discusses the preservative method developed by Bell System engineers. External deterioration of an untreated pole in service begins in the ground section with infection by wood-destroying fungi which, once established, continue there unless adverse conditions are imposed, as for example, by the application of a suitable wood preservative. Two general classes of preservatives might be used for ground-line treatment, (1) oily materials such as creosote, and (2) water solutions of toxic salts such as zinc chloride and sodium fluoride. Sodium fluoride is particularly good for penetrating the heartwood of cedar and chestnut timbers, but it is not permanent. Creosote or creosote and coal tar, although not as penetrating as the water-soluble salt, is as lasting as any preservative known.
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Pole Treatment. Nature 154, 360 (1944). https://doi.org/10.1038/154360c0
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DOI: https://doi.org/10.1038/154360c0