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<p>This paper discusses the results of a study of the effect of the rate of cooling upon the magnetic and other properties of an annealed eutectoid steel. In carrying out the experiment, six specimens of this steel were selected, heated to 800°C., and allowed to cool at various rates - one in air, another in lime, and the remainder in the furnace at slower and slower rates. The following properties were then measured: Normal induction for ordinary and large magnetising forces, residual induction, coercive force, resistivity, and Shore scleroscope hardness. In order to study the metallographic structure of the steel, micrographs of each specimen were made at a magnification of 500 diameters. A study of the experimental results
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