. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Bui. 1131, U. S. Dept. of Agriculture. Plate Frost Injury to Pinus monticola and Pinus albicaulis. A .—Transverse section through a stem of Pinus monticola, showing the termination of the pre- ceding annual ring (at the outer margin of the resin canal at bottom of picture) and three frost rings occurring in the early portion of the succeeding growth ring. (X135.) B— Transverse section through a frost ring in Pinus albicaulis, showing the crii'npling of the wood cells that were bu
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. Bui. 1131, U. S. Dept. of Agriculture. Plate Frost Injury to Pinus monticola and Pinus albicaulis. A .—Transverse section through a stem of Pinus monticola, showing the termination of the pre- ceding annual ring (at the outer margin of the resin canal at bottom of picture) and three frost rings occurring in the early portion of the succeeding growth ring. (X135.) B— Transverse section through a frost ring in Pinus albicaulis, showing the crii'npling of the wood cells that were but slightly lignified at the time of freezing and the formation of a radial cleft (at the left) which has become filled by large-celled parenchyma. (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
