Proceedings of the Annual Convention 30 (1929)

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— One oval or circular in form.
Spike Knot. — A branch or limb sawed in a lengthwise direction.
Quality Sound Knot. — One solid across its face, as hard as the surrounding wood, and showing no indications of decay. It may vary in color from red to black.
Unsound Knot. — One solid across its face but containing incipient decay.
Decayed Knot. — One softer than the surrounding wood and containing advanced decay.
Tight Knot. — One so fixed by growth or position that it will firmly retain its place
...in the piece.
Intergrown Knot. — One whose rings of annual growth are completely intergrown with those of the surrounding wood.
Watertight Knot. — One whose rings of annual growth are completely intergrown with those of the surrounding wood on one surface of the piece, and which is sound on that surface.
Encased Knot. — One whose rings of annual growth are not intergrown and homogeneous with those of the surrounding wood. The encasement may be partial or complete; or pitch or bark.


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