. Controlling rats and mice. Mice; Rats. Fig. 4. Evidences of rats: Droppings and damage to grain sacks; tracks in dust; a freshly gnawed post, and footprints and tail marks in flour. Courtesy of U. S. Public Health 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 Storer, Tracy I. (Tracy Irwin), 1889-1973. [Berkeley, Calif. ] : College of Agriculture, University of California

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