Wood and Other Organic Structural MaterialsMcGraw-Hill book Company, Incorporated, 1917 - 478 páginas |
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Palavras e frases frequentes
American APPEARANCE applied bark Birch Black Bulletin California Catalpa Cedar cells Chelura chemical close-grained coal-tar coat COLOR common name compact structure creosote CUBIC FOOT Cypress Dicotyledons durable Engineers Eucalyptus FEATURES OF TREE feet in diameter feet in height fibers fire Florida Forest Service Forestry Division).¹ fungi glue GRAIN OF WOOD grow Heartwood heat Hickory hundred inches known layers leaves Limnoria LOCALITIES Longleaf Pine lumber Mahogany Maple materials medullary rays MODULUS OF ELASTICITY MODULUS OF RUPTURE moisture NOMENCLATURE Sudworth obtained paint pieces Pine Pinus pith-rays plants POUNDS PER CUBIC preservative properties QUALITIES OF WOOD quantities railway resin rubber sapwood sapwood lighter SEASONED WOOD shipworm soft sometimes species Spruce STRUCTURAL QUALITIES surface temperature tests by United thick thin timber tracheids trunks United States Forest varnish Walnut WEIGHT OF SEASONED westward intermittently White Pine WOOD IN POUNDS wood-elements yearly bands yield zinc chloride
Passagens conhecidas
Página 277 - The American Society of Mechanical Engineers and is administered by a Board of Award consisting of representatives of the American Society of Civil Engineers, the American Institute of Mining and Metallurgical Engineers, The American Society of Mechanical Engineers, and the American Institute of Electrical Engineers.
Página 344 - To contain not less than 2."i per cent of constituents that do not distil over at a temperature of 600 Fahrenheit.
Página 15 - By reasonable thrift, we can produce a constant timber supply beyond our present need, and with it conserve the usefulness of our streams for irrigation, water supply, navigation, and power. Under right management, our forests will yield over four times as much as now.
Página 346 - When two hundred (200) grams of the oil are distilled in accordance with the requirements of the specifications for the analysis of...
Página 260 - In cases where timbers do not contain the pith, and it is impossible to locate it with any degree of accuracy the same inspection shall be made over 3 in. on an approximate radial line beginning at the edge nearest the pith in timbers over 3 in. in thickness and on the second inch (on the piece) nearest to the pith in timbers 3 in.
Página 345 - ... inch above the surface of the oil — the creosote, calculated on the basis of the dry oil, shall give no distillate below...
Página 259 - At the request of the Committee on Wooden Bridges and Trestles of the American Railway Engineering...
Página 260 - ... acceptable, provided that the amount of summer wood as above measured shall be at least one-half. The contrast in color between summer wood and spring wood shall be sharp, and the summer wood shall be dark in color, except in pieces having considerably above the minimum requirement for summer wood. (b) Sound southern yellow pine shall include pieces of southern pine without any ring or summer-wood requirement.
Página 42 - ... red or black, and is so fixed by growth or position that it will retain its place in the piece.
Página 260 - ... all as measured over the third, fourth and fifth inches on a radial line from the pith. Wide-ringed material excluded by this rule will be acceptable provided that the amount of summer wood as above measured shall be at least one-half.