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Dr. Steiniger discusses the biology, control, organization for control, and disease vectored by the “wanderratte” (Norway rat) and the “hausratte” (roof rat). He briefly mentions a large species of vole or meadowmouse and the American muskrat which was introduced into Europe some score years ago. He has skillfully condensed considerable information in his 149 pages. In his chapter on organization for rat control he stresses poisoning programs. The section of baits, poisons and traps occupies 73 pages. He discusses the importance of rat-proof construction and harborage removal in 10 pages and 11 figures after remarking that this phase of rat control has had too little attention in Germany to date. His account of means of rat proofing sewer and drainage systems presents several helpful new figures.
In a comparison of general public campaigns of rat control and the role of limited individual control, he gives advantages and disadvantages of each. The individual attempts generally fail. The usefulness is mentioned of experienced professional pest control organizations as a year long deterrent to large rat populations.