. Defects in timber caused by insects. Wood; Forest insects. 12 BULLETIN 1490, U. S. DEPARTMENT OF AGRICULTURE. Fig. 11.—Pinholes in the sap-wood of high-grade cypress blocks ; end view of logs in freight car; wood completely riddled by ambrosia beetles (Platypus compositus and XijWborus sp.). 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 Snyder, Thomas Elliott, b. 1885. Washington, D. C. : U. S. Dept. of Agriculture

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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwa, booksubjectwood