. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 1.—Sheet of lead alloy which was tacked over infested section of oak. Area between the lines marked A was covered with a strip of zinc which prevented the beetles from emerging. (Table 1, No. 26b.) Photograph by Fig. 2.—Sheet of lead aUoy just under the pre- ceding. Shows how thebeetles mined to the side when they were stopped by the zinc. (Table 1, No. 26b,) Photograph by H. E. —j4jSheet of lead alloy which was covered by the sheet of zinc, B. Most of the beetles were unable to penetrate
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 1.—Sheet of lead alloy which was tacked over infested section of oak. Area between the lines marked A was covered with a strip of zinc which prevented the beetles from emerging. (Table 1, No. 26b.) Photograph by Fig. 2.—Sheet of lead aUoy just under the pre- ceding. Shows how thebeetles mined to the side when they were stopped by the zinc. (Table 1, No. 26b,) Photograph by H. E. —j4jSheet of lead alloy which was covered by the sheet of zinc, B. Most of the beetles were unable to penetrate the zinc and stopped in A. One, marked A on sheet B, did penetrate thezuic. (Table 1, No. 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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Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
