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
Fig. is.—Vertical section ofMaple Branch (at the endof the first year, showingmedullary ray from pith tobark, magnified) … Fig. 19.—Cress section of me-dullary rays (magnified) Sap wood consists of the last few rings still alive,whose cells are open to let the sap flow through to feedall parts of the tree, and also to store the food, workedover by the leaves, for winters use. WOOD 29 Heart wood is the wood inside the…
Woodwork (Manual training) · Cabinetwork
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