. Report upon the forestry investigations of the U. S. Department of agriculture. 1877-1898. Forests and forestry. c. G E Tangential Sections of Pinus t>cda, heterophylla, and glabra. A, Pinus heterophylla Radial and tangential sections of a transverse resin duct; r. d , resin duct; m. r. medullary ray; tr., tracheids of the medullary ray; p., parenchyma cells of the tame; c Jr., common tracheids or wood fibers. B-G, Pinus glabra. B, tangential section of a transverse resin duct and parts of three fibers; b. />., bordered pit; other letters as above; C-G, tangential sections of medullary
. Report upon the forestry investigations of the U. S. Department of agriculture. 1877-1898. Forests and forestry. c. G E Tangential Sections of Pinus t>cda, heterophylla, and glabra. A, Pinus heterophylla Radial and tangential sections of a transverse resin duct; r. d , resin duct; m. r. medullary ray; tr., tracheids of the medullary ray; p., parenchyma cells of the tame; c Jr., common tracheids or wood fibers. B-G, Pinus glabra. B, tangential section of a transverse resin duct and parts of three fibers; b. />., bordered pit; other letters as above; C-G, tangential sections of medullary rays, of which E is made up of tracheids only, while D is a '" triple" ray jET, Pinus t^da. Tangential sections of medullary rays in spring and summer wood. Original magnified *;<*, illustrations about 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
