Circular, Numerot 51–125

acre amount Assistant Forester average black locust board feet catalpa chestnut Chief cost cottonwood creosote cubic foot cultivation Department of Agriculture distillation Douglas fir durable European larch fence posts fire flask FOREST PLANTING Forest Service FOREST SERVICE-Circular fractional distillation fractions GIFFORD PINCHOT grades green ash grow grown hardwoods heartwood honey locust inches in diameter insects land loblolly pine logging longleaf pine manufacture mixture Moisture per cent naphthalene North Platte Norway spruce nursery open-tank method Osage orange plantation poles poplar preservative protection quantity red cedar red oak red pine region retort roots rows seasoning seed seedlings shade soil South spacing species specific gravity sprouts spruce staves strength stumpage sugar maple TABLE tamarack tank temperature tests thinning timber tion transplanted treatment weight white elm white oak white pine windbreaks wood yellow pine young trees