. Report upon the forestry investigations of the U. S. Department of agriculture. 1877-1898. Forests and forestry. Fig. 13.—"Wood of maple. Fig. H.—"Wood of (lm. a rod < 1m; b white elm; c winged olm. Two groups of birches can be readily distinguished; though specific distinction is not always possible. 1. Pith rays fairly distinct, the pores rather few and not more abundant in the spring wood; wood heavy, usually darker - Cherry birch and yellotv Urdu 2. Pith rays barely distinct, pores more numerous and commonly forming a more porous spring-wood zone; wood of medium weight - Can
. Report upon the forestry investigations of the U. S. Department of agriculture. 1877-1898. Forests and forestry. Fig. 13.—"Wood of maple. Fig. H.—"Wood of (lm. a rod < 1m; b white elm; c winged olm. Two groups of birches can be readily distinguished; though specific distinction is not always possible. 1. Pith rays fairly distinct, the pores rather few and not more abundant in the spring wood; wood heavy, usually darker - Cherry birch and yellotv Urdu 2. Pith rays barely distinct, pores more numerous and commonly forming a more porous spring-wood zone; wood of medium weight - Canoe or paper birch. The species of maple may be distinguished as follows: 1, Most of the pith rays broader thm the pores and very conspicuous „....•.„— - „ - Sugar Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Fernow, B. E. (Bernhard Eduard), 1851-1923; United States. Forest Service. Washington, Govt. print. off.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
