Educational woodworking for home and school (1908)
Park, Joseph C. (Joseph Charles), b. 1872 · New York, The Macmillan company · leaf 256
tracts of hard fibers forming the firmpart of oak wood; pr, pith rays. rings distinct by a zone of large pores collected in thespring wood, alternating with the denser summer wood(Fig. 235). FOR HOME AND SCHOOL 235 III. Diffuse-porous Woods. — Pores numerous, usuallynot plainly visible on cross… … Beech } .Sycamore ! Birch ! Fig. 236. — Diffuse-porous woods, ar, annual ring; pr, pith rays whichare broad at a, fine at b, indistinct at d. Note. — The above described three groups are exog-enous, i.e. they grow by adding annually wood on theircircumference. A fourth group is formed by the…
Woodwork (Manual training)
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
