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    • The “Night-shining Clouds” - Nature

      Nature· 2 days ago

      On July 2, 1889, this was found to be somewhat over 80 kilometres. The question is therefore set at rest as to whether the clouds are self-luminous, for it is evident that at such a height their ...

    • Cloud Formations As Observed From Aeroplanes - Nature

      Nature· 2 days ago

      THE recent development of aviation has provided a means of observing clouds which is much superior to any hitherto known. A modern aeroplane can reach the clouds in a very short time, and in ...