Educational woodworking for home and school (1908)
Park, Joseph C. (Joseph Charles), b. 1872 · New York, The Macmillan company · leaf 255
ces of thin glass for study under themicroscope or by holding to the light. After a few trialsthe value of the key will be understood and it will createmuch interest in woods. 1 The following key is taken from Timber, Bulletin No. 10,U.S. Dept. of Agric., Division of Forestry. 233 234 EDUCATIONAL… … H O.G. ar-i . •.sp.w.- >p.w ■i?-i 3. 234. — Non-porous woods. A, fir; 5, hard pine; C, softar, annual ring; o.e., outer edge of ring; i.e., inner edge ofs.w., summer wood; sp.w., spring wood; rd, resin ducts. ods. A, fir; B, hard pine; C, soft pine;er edge of ring; i.e., inner edge of…
Woodwork (Manual training)
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