Circular, Temas101-150The Service, 1907 |
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Página 8
... forest - grown trees . It also shows that their used length includes a smaller top diameter than that of open - grown trees , a result of having the knots spaced farther apart . TABLE 2. - Used length , clear length , and [ Cir . 102 ] 8.
... forest - grown trees . It also shows that their used length includes a smaller top diameter than that of open - grown trees , a result of having the knots spaced farther apart . TABLE 2. - Used length , clear length , and [ Cir . 102 ] 8.
Página 17
... knots . Any larger - sized trees will receive but little benefit by this practice . When the remaining stand is 35 or 40 years old the crowns should again be crowding , but to stimulate height growth the second thin- ning should not be ...
... knots . Any larger - sized trees will receive but little benefit by this practice . When the remaining stand is 35 or 40 years old the crowns should again be crowding , but to stimulate height growth the second thin- ning should not be ...
Página 7
... knot holes and to working the preservative into the wood , thus protecting against decay those parts most subject to attack . Careful notes were made of the condition of the poles as regards checks , knot holes , etc. The amount of ...
... knot holes and to working the preservative into the wood , thus protecting against decay those parts most subject to attack . Careful notes were made of the condition of the poles as regards checks , knot holes , etc. The amount of ...
Página 9
... knots , stains , " cat faces , " and wormholes , all of which lower seriously the grade of ordinary lumber , do not count as defects in car timbers . Bridge timbers and switch ties are cut from the same kind of mate- rial and under the ...
... knots , stains , " cat faces , " and wormholes , all of which lower seriously the grade of ordinary lumber , do not count as defects in car timbers . Bridge timbers and switch ties are cut from the same kind of mate- rial and under the ...
Página 14
... knot , or slash made with an ax , as well as fire scars , will give the insect entrance into the trunk , " but the older trees are always the more Many white oak trees which have come up under the [ Cir . 105 ] 16 Tolerance 14.
... knot , or slash made with an ax , as well as fire scars , will give the insect entrance into the trunk , " but the older trees are always the more Many white oak trees which have come up under the [ Cir . 105 ] 16 Tolerance 14.
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Términos y frases comunes
acre air-dried amount Appalachian Assistant Forester average bark barrel board feet breasthigh cedar chestnut oak Chief Circular coal-tar coal-tar creosote cords cost cubic feet cubic foot distillation Douglas fir elastic exports Forest Service fractional distillation fractions GIFFORD PINCHOT grades green growth hardwood heartwood hemlock inches in diameter increase index of refraction knots loblolly pine lodgepole pine logging longleaf pine lumber manufacture Maximum method Minimum modulus Moisture per cent North Carolina North Platte open-tank Oregon Partially air dry planting poles poplar posts pounds per square quantity red oak reference number region Rings per inch sapwood sawed seasoning seedlings shows slope soil South America species specific gravity sprouts spruce square inch staves steam sticks strength stumpage stumps Table tamarack tank temperature Tennessee tests timber tion treated trees turpentine volume Washington weight western western hemlock white oak white pine wood yellow pine
Pasajes populares
Página 6 - QUANTITY. VALUE. a From annual report of the Bureau of Statistics of the Department of Commerce and Labor upon the commerce and navigation of the United States.
Página 17 - Sawed boards, plank, deals, and all forms of sawed cedar, lignum vita;, lancewood, ebony, box, granadilla, mahogany, rosewood, satinwood, and all other cabinet woods not further manufactured than sawed, fifteen per centum ad valorem; veneers of wood, and wood, unmanufactured, not specially provided for in this act, twenty per centum ad valorem.
Página 17 - Sawed boards, planks, deals, and other lumber of whitewood, sycamore, a«iJ basswood, one dollar per thousand feet board measure; sawed lumber, not specialty provided for in this act, two dollars per thousand feet board measure; but when lumber of any sort is planed or finished, in addition to the rates herein provided, there shall be levied and paid for each side so planed or finished fifty cents per thousand feet board measure...
Página 16 - ... well manufactured, full to size and saw butted, and shall be free from the following defects: Unsound, loose, and hollow knots, wormholes and knot holes, through shakes or round shakes that show on the surface; and shall be square edge, unless otherwise specified. A through shake...
Página 17 - Virginiana) timber, hewn, sided, squared, or round; sticks of partridge, hair wood, pimento, orange, myrtle, bamboo, rattan, reeds unmanufactured, india malacca joints, and other woods not specially provided for in this section, in the rough, or not further advanced than cut...
Página 20 - OTHER PUBLICATIONS OF THE FOREST SERVICE WHICH DEAL WITH WOOD PRESERVATION. Bulletin 10. Timber: An Elementary Discussion of the Characteristics and Properties of Wood. (Securable only by purchase from the Superintendent of Documents, Government Printing Office, Washington, DC Price, 10 cents.) Bulletin 41. Seasoning of Timber. Bulletin 50. Cross-Tie Forms and Rail Fastenings, with Special Reference to Treated Timbers.
Página 3 - Tables 16, 17, 18, and 19, are taken from the report of the Bureau of Statistics of the Department of Commerce and Labor upon "The Foreign Commerce and Navigation of the United States for the year ending June 30, 1907.
Página 17 - Timber, hewn, sided or squared otherwise than by sawing (not less than eight inches square) and round timber used for spars or in building wharves, one-half of one cent per cubic foot.
Página 27 - August 18, 1894, and March 3, 1899. is to obtain, by dredging, a channel not less than 5 feet deep and 150 feet wide, and to protect Livingston Point and Tennessee Island from erosion with a view to preserving the port of Paducah, Ky.
Página 1 - ... to institutions and associations. There is a, little over three-fifths of an acre of forest for each citizen, and though 53 cubic feet of wood to the acre is produced in a year, wood imports have increasingly exceeded wood exports for over forty years, and 300,000,000 cubic feet, valued at $80,000,000, or over one-sixth of the home consumption is now imported each year. Germany's drains on foreign countries are in the following order: Austria-Hungary, 19,750,000 tons; Russia and Finland, 18,000,000...