Mammals are able to maintain their body temperatures in the face of cold stress through the insulation provided by their fur. In this study we explore a method for evaluating this insulating layer in dead animals and measure the modification of its effectiveness by changes in extent, thickness or air movement.

These studies were supported in part under contract between the University of Wisconsin and the Alaskan Air Command, Arctic Aeromedical Laboratory, Ladd Air Force Base, Alaska, and by a research grant from the Wisconsin Alumni Research Foundation.

Tundra redback voles (Clethrionomys rutilus dawsoni), tundra voles (Microtus economis macfarlani), and long-tail shrews (Sorex cinereus hollisteri) were trapped near Fairbanks, Alaska, in February and March of 1952. Bodies were obtained either from animals found frozen in live traps or from animals which died as a result of exposure or other...

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