Abstract
American Journal of Science, April.—On the temperature coefficients of certain seasoned hard steel magnets, by Arthur Durward. The author examined the temperature coefficients of a large number of stout magnets seasoned according to the method of Barus and strouhal. If the temperatures are plotted as abscissæ and the percentage losses of magnetic moment as ordinates,the curves obtained show a slight concavity upwards in most cases, which implies,that the loss of moment becomes accelerated at the higher temperatures.Some specimens show an anomalous behaviour, which can be traced to local softening of the steel, and a temperature coefficient considerably augmented in consequence.—The skull of Amphictis by E. S. Riggs. Describes an almost complete skull in the Princeton collection from the phosphprites. It is unusually small, the length from the incisors to the condyles being: 074 m. The cranium is well expanded, showing a large and well-convoluted brain. The nasals are narrow and slender as in thie cisets.
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Scientific Serials. Nature 58, 92–93 (1898). https://doi.org/10.1038/058092b0
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DOI: https://doi.org/10.1038/058092b0