. Elements of forestry. Forests and forestry. Fig. 42. — Cross Section of Black Oak (Quercus Velutina). Magnified 50 diameters. This shows the large pores in the spring wood and the heavier and denser summer wood. Note parts of two growth rings and the line demarking them. locust. Those of medium strength are cypress, Douglas fir, ash, beech, red oak, chestnut and sycamore. Some of our weakest woods, in this respect, are white and other soft pines, hemlock, spruce, basswood, yellow poplar, cottonwood and the western firs. Hardness. — Woods vary a great deal in their hardness, which may be expr
. Elements of forestry. Forests and forestry. Fig. 42. — Cross Section of Black Oak (Quercus Velutina). Magnified 50 diameters. This shows the large pores in the spring wood and the heavier and denser summer wood. Note parts of two growth rings and the line demarking them. locust. Those of medium strength are cypress, Douglas fir, ash, beech, red oak, chestnut and sycamore. Some of our weakest woods, in this respect, are white and other soft pines, hemlock, spruce, basswood, yellow poplar, cottonwood and the western firs. Hardness. — Woods vary a great deal in their hardness, which may be expressed as resistance to indentation or to the saw or axe across grain. Hardness is dependent largely on. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Moon, Frederick Franklin, 1880-1929; Brown, Nelson Courtlandt, 1885-. New York J. Wiley
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
