. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Bui. 1131, U. $. Dept. of Agriculture. Plate A. Frost Injury to Thuja plicata, Pseudotsuga taxifolia, and Larix occidentalis. A —Transverse section through frost ring in Thuja plicata, showing a pronounced distortion of the medullary rays. (X135.) B .—Transverse section through frost ring in Pseudotsuga taxijolia, showing the crumpling of the wood cells that were but slightly lignified at the time of freezing (x 135.) C—Transverse section through frost ring in occidentalis sap
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Bui. 1131, U. $. Dept. of Agriculture. Plate A. Frost Injury to Thuja plicata, Pseudotsuga taxifolia, and Larix occidentalis. A —Transverse section through frost ring in Thuja plicata, showing a pronounced distortion of the medullary rays. (X135.) B .—Transverse section through frost ring in Pseudotsuga taxijolia, showing the crumpling of the wood cells that were but slightly lignified at the time of freezing (x 135.) C—Transverse section through frost ring in occidentalis sapling (tree JN o. l), at 146 centimeters above the ground, showing an extreme case of lateral displacement of tne medullary rays. (X135.). 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 United States. Dept. of Agriculture. [Washington : U. S. Dept. of Agriculture]
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1913
