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 37
t warp or twist much,as the yearly rings are on edge, through the board(Fig. 29). SUGGESTIVE QUESTIONS 35 Bastard lumber is lumber sawed so that the yearlyrings are somewhat parallel to the face of the boards,and as the spring wood and summer wood in each yearlyring are different in structure (the… … much more than the older layers, causing the board to bepulled back, or warp toward the outside of the tree(.see Fig. 30). SUGGESTIVE QUESTIONSWood 1. What can you say of the usefulness of wood? 2. What kind of wood does a carpenter and builder desire? 3. What special qualities should the wood used…
Woodwork (Manual training) · Cabinetwork
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