. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 'M%m. Fig. 1.—Infested section of oak covered with alloys and building paper in layers, but with narrow strip of sheet steel that was placed between layers of lead alloy and top layer of alloy removed. Shows beetles in holes where they were stopped by steel. Photograph by Fig. 2.—Section of infested oak with all the layers of alloy removed, showing how many of the beetles attempted to escape from the sides instead of boring through the alloys. Photograph by H. E. Please note that these images are ext
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 'M%m. Fig. 1.—Infested section of oak covered with alloys and building paper in layers, but with narrow strip of sheet steel that was placed between layers of lead alloy and top layer of alloy removed. Shows beetles in holes where they were stopped by steel. Photograph by Fig. 2.—Section of infested oak with all the layers of alloy removed, showing how many of the beetles attempted to escape from the sides instead of boring through the alloys. Photograph by H. E. 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, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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