Bulletin of the of Agriculture . Maple (Cross Section, Magnified 50 Diameters). A Diffuse-Porous Wood. AR, annual ring; SP, springwood; SIF, summerwood; MR, medullnry ray; P, pith fleck; V,pores or vessels; A, wood prosenchyma (fibers, etc.). Bui. 606, U. S. Dept. of Agriculture. Plate Red Oak (Cross Section, Magnified 50 Diameters). A Ring-Porous Wood. AR, annual ring; SP, springwood; Sir, summerwood; ME, medullary ray; I, pores or vessels;J\T, wood prosenchyma (fibers, etc.). Bui. 606, U. S. Dept of Agriculture. Plate III.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear