A node is a particular type of imperfection in a piece of structural timber, which reduces its force, but which can be exploited for the artistic effect. In a longitudinal-sawn board, a node will appear as piece (usually darker) full harshly circular with wood around whose the harshly parallel fibres (grain) of the remainder of runs (parts and joined).
A node is really part of a side branch (or a dormant bud) included in the wood of the stem or the larger branch. The part included is irregularly conical in the form (consequently the harshly circular cross section) with the end at the point in diameter of stem at which the cambium of the factory was located when the branch formed like bud. In a node, the fibre direction (grain) is of up to 90 degrees of different from fibres of the stem, of this fact producing the transversely local grain.
During the development of a tree, the lower limbs often die, but can persist during a certain time, sometimes years. Following layers of growth of the stem of fixing more are not closely joined with the died member, but are developed around him. Consequently, the dead branches produce the nodes which are not joined, and probable...
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