The Structure of Wood And Some of Its Properties And Uses An Address Before the
The book The Structure of Wood And Some of Its Properties And Uses An Address Before the was written by author Eloise Gerry Here you can read free online of The Structure of Wood And Some of Its Properties And Uses An Address Before the book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Structure of Wood And Some of Its Properties And Uses An Address Before the a good or bad book?
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The ends, however, lap each other approxi- *I. W. Bailey "Preservative Treatment of Wood. " For Quar. Vol. XI, No. 1, March, 1913. 3 477626 inateiy one-third of the liber length and the fibers run parallel to the longitudinal axis of the tree. The sap 111 passing up a comierous tree zoo feet in height muse tnen traverse approximately 3t> f2, OUU of the fibers. These elements serve two purposes, viz. , to give the required mechanical strength to hold the crown of leaves up into the light and air..., and also to conduct the crude sap 'from the roots to the leaves. Medullary Rays. Other important elements are the medullary rays. (!See 4 'mr " in Plates 1, li, ill, and 1V. J These are made up 01 short brick-shaped cells. Tlie rays extend from the pitn to tiie bant and run at right angles to the longitudinal axis of the tree. In any cross sectional disc from a tree they are seen to extend irom the pitn to the circumference like the spoKes in a wheel. The rays are much more conspicuous in such hardwoods as oak or beech where they produce the so-called "silver grain" ("mr" in Hate Iff) than they are m any of the soft woods.
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