. Bulletin. Agriculture. -w ,-*« ') _ I . 4 4 %â â Fig. 1.âSection of infested oak withThalf of surface coated with tallow one-fourth inch thick. The beetle emerged through it without trouble as long as it was cold and hard. (Table 4, No. 8.) Photograph .by H. Fig. 2.âPart of roll of alloy, one-half of which was covered with tallow before it was rolled around infested wood. Holes are clean in untallowed section. A number of beetles were caught and died in the tallow when it was softened by the heat. (Table 3, No. 11.) Photograph by H. E. Fit} 3.âLayers No. 1, No. 2, and No
. Bulletin. Agriculture. -w ,-*« ') _ I . 4 4 %â â Fig. 1.âSection of infested oak withThalf of surface coated with tallow one-fourth inch thick. The beetle emerged through it without trouble as long as it was cold and hard. (Table 4, No. 8.) Photograph .by H. Fig. 2.âPart of roll of alloy, one-half of which was covered with tallow before it was rolled around infested wood. Holes are clean in untallowed section. A number of beetles were caught and died in the tallow when it was softened by the heat. (Table 3, No. 11.) Photograph by H. E. Fit} 3.âLayers No. 1, No. 2, and No. 23 of lead alloy rolled 27 times around an infested section of oak. Shows how the numbers of beetles penetrating the alloy kept diminish- ing as thicknesses increased. Thirty-seven went through the first, 14 through 12, and only 3 through 23 thicknesses; two of these went through the 24th but were stopped by the 25th. This was the greatest penetration obtained. (Table 2, No. 55a.) Photo- graph by H. E. Burke. Fig. 4.âBeetle in gallery constructed in sn-TTiTn. (i|-inch) cork. A num er of other beetles were found in similar situa- .tions, the corks being used as stoppers to vials containing specimens in alcohol. Enlarged 2^ times. Photograph by H. E. Burke. THE LEAD-CABLE 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 : Dept. of Agriculture
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectagriculture, bookyear
