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    • The Shifting of Spectral Lines - Nature

      Nature· 1 day ago

      I. THE Astrophysical Journal for February contains some papers of the highest interest, touching small variations in the wave-lengths of spectral lines ...

    • The Spectrum of Ionised Sodium - Nature

      Nature· 1 day ago

      WITH reference to the interesting and important note by O. Laporte in NATURE of June 16, p. 941, the pairs of differences in the wave numbers which I found ...

    • The Aurora and its Spectrum1 - Nature

      Nature· 1 day ago

      THE two outstanding features that characterise the spectrum of the polar aurora are a set of four well-marked bands belonging to the first negative group of nitrogen, and a strongly denned very ...

    • Radar Observation of Heavy Rain - Nature

      Nature· 1 day ago

      WHILE a certain amount of data on radar obsecrations of tropical rain has been published, the accompanying photographs of a radar P.P.I. screen showing a belt of heavy rain passing over the ...