. Principles of American forestry . Forests and forestry. CHAPTER XIII. DURABILITY OF WOOD. Decay in Wood is due to the breaking down of the tissues by fungi. In some eases the fungus destroys the woody cells; in others it uses up the starch found in the cells and merely leaves a blue stain (bluing of lumber). Some kinds of fungi attack only con- ifers others only hard woods; some are confined to one species while othere may affect several species, but nrobably no one of them attacks all kinds of wood Fig. 63 shows the Fig, 70—"Shelf" fungus on the discoloration of wood by a stem of
. Principles of American forestry . Forests and forestry. CHAPTER XIII. DURABILITY OF WOOD. Decay in Wood is due to the breaking down of the tissues by fungi. In some eases the fungus destroys the woody cells; in others it uses up the starch found in the cells and merely leaves a blue stain (bluing of lumber). Some kinds of fungi attack only con- ifers others only hard woods; some are confined to one species while othere may affect several species, but nrobably no one of them attacks all kinds of wood Fig. 63 shows the Fig, 70—"Shelf" fungus on the discoloration of wood by a stem of a pine (Hartig) a, gj^g]f fungus. The wood Sound wood; o, resinous wood; c, partly decayed wood or Contains the fungus plant, punk; rf, layer of living spore which, when ready to pro- tunes; e, old spore tubes rilled . " up; /, fluted upper surface of duce its spores, Sends out the fruiting body of the fungus a shelf-liko bodv on the which gets its tood through a . ', m great numljer of fine threads Side of the WOod. These (the mycelium), its vegetative shelves contain the sporcs tissues penetrating the wood and causing it to decay. and may be found on many old decayed trees or stumps. Various odors are protluced in the wood by some of 230. 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 Green, Samuel B. (Samuel Bowdlear), 1859-1910. New York, J. Wiley & Sons
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