The Distribution of Energy in the Spectrum of Erbium Oxide

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Abstract
Synopsis.—In the experiments described in this paper the statements of previous observers to the effect that the selective emission of erbium oxide is not due to volatilization but is a radiation from the solid itself are corroborated. The temperatures at which the bright bands appear, reach their maximum and disappear are measured. By detailed spectrophotometric measurements it is shown that at 1000° C. both the red and green groups of bands greatly exceed in intensity the radiation of similar portions of the spectrum of a black body at the same temperature.

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