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    • Landslips - Nature

      Nature· 22 hours ago

      In certain districts in the immediate neighbourhood of Northwich the ground is completely honeycombed with rock-salt mines that had been worked out and abandoned. Into many of these fresh water ...

    • Mirage: Natural and Artificial - Nature

      Nature· 22 hours ago

      In natural mirage the non-homogeneous strata generally form horizontal layers, and in different conditions the air above or below the stratum may be the denser. The refractive index of a gas ...

    • Societies and Academies - Nature

      Nature· 1 day ago

      —T. Smith: A general survey of the thin double lens. The shapes of the lenses and the types of glass suit able for the construction of an objective free ...

    • Preservation of Fossil Bones - Nature

      Nature· 21 hours ago

      THE difficulty of preserving fossil bones found in deposits of the later phases of the Ice Age or more recent beds is known to collectors and museum curators; often enough the bones crumble ...

    • The Wedge Photometer 1 - Nature

      Nature· 23 hours ago

      MUCH attention has recently been directed to the use of a wedge of shade glass as a means of measuring the light of the stars. While it has been maintained by various writers that this device ...