Berlin, Springer, 1929. 8vo. In contemporary half cloth with gilt lettering to spine. In ""Zeitschrift für Physik"", bd. 58, 1929. Entire issue offered. Library stamp to front free end-paper, otherwise fine and clean. Pp. 205-216. [Entire volume:VIII, (1), 865 pp.].
Reference : 49015
First printing of Becquerel's paper on the peculiar optical properties of the lanthanides for which he observed sharp absorption lines for lanthanide salts at low temperature.
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