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Framing, Sheathing, and Insulation
ISBN-13:
9780243777938
Veröffentl:
2017
Seiten:
0
Autor:
John E. Ball
eBook Typ:
PDF
eBook Format:
Reflowable
Kopierschutz:
NO DRM
Sprache:
Englisch
Beschreibung:
Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The series of concentric rings sur rounding the pith are formed by the growth of the tree, one ring being added on the out side each year; hence the name, annual rings. These annual rings, as shown in the enlarged section, Fig. 1 - 2, are composed of fibers or long tubes running parallel to the trunk of the tree. The annual rings are crossed by fibers or cells that run from the bark of the tree to its center, conveying nourishment from the outer cambium layer to the inner part of the tree. These cells are called medullary rays.
The series of concentric rings sur rounding the pith are formed by the growth of the tree, one ring being added on the out side each year; hence the name, annual rings. These annual rings, as shown in the enlarged section, Fig. 1 — 2, are composed of fibers or long tubes running parallel to the trunk of the tree. The annual rings are crossed by fibers or cells that run from the bark of the tree to its center, conveying nourishment from the outer cambium layer to the inner part of the tree. These cells are called medullary rays.