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The demand for poles 455
Experiments of the Forest Service 461
19 other sections not shown
20 pounds absorbed absorption acid air-dry amount anthracene antiseptic apparatus applied arms average bath butt carbolineum cent coal coal-tar creosotes class coat contained creo creosote oil cross-arms cubic centimeters cubic foot curves for samples cylinder decay determined Eastern hemlock experimental experiments feet flask Forest Service Circular Fractional distillation gallons grams ground line heartwood heated hemlock impregnation inch index of refraction injected loblolly pine longitudinal longleaf longleaf pine loss material ment mixed coal-tar creosotes mixture moisture content naphthalene obtained paraffin penetration pile portion pounds per cubic preservative treatment pressure quantity radial rate of seasoning residue resin ducts samples classified sapwood shingles Shortleaf pine showed solution species specific gravity specimens springwood spruce Steamed at 20 summerwood Table tamarack tank tars temperature timber tion tracheids treated wood treating plant untreated vacuum volatile wood preservation xylol zinc chloride