High school manual training course in woodwork, including cost of equipment and supplies and studies on trees and wood (1905)
Ritchey, Samuel Edward, 1866- · New York, American Book Company · leaf 30
and becominglight, dry, and empty as the tree grows larger everyyear.2d—The Layer of Wood—traversed by the medullaryrays—composed of woody tissue—many sided, thin- 28 WOOD walled cells—some large, open ducts—some spiralducts. The outer part of this layer is the live partof the tree. 3d—The Bark or… … Fig. 17.—Section of Silver Maple at the end of the first year,highly magnified: a, medullary ray; 6, pith; c, spiral vessels ofmedullary sheath; d, h. dotted ducts; e, counter duct; /.wood;g, annular duct; i, inner fibrous bark; j, green bark; fc, corkyenvelope; I, outer bark, epidermis. (See Figs.…
Woodwork (Manual training) · Cabinetwork
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