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    • Aspect - Nature

      Nature· 1 day ago

      Every surface has at every point an aspect, which is the direction of a normal at that point. This may be regarded as the first property of surfaces, for if we define a surface ...

    • North-Western District of British Guiana - Nature

      Nature· 1 day ago

      Farther inland the mangroves pass into forests of tropical trees, which, as the land rises more steeply, are reduced to strips along the rivers, and finally merge into dry grassy uplands known ...

    • Aurora - Nature

      Nature· 1 day ago

      AN aurora of considerable proportions and of the radiant form was visible here on Wednesday night. At 9 p.m. the centre of energy was in the north-west, and from a large blunted ...

    • Biological Notes - Nature

      Nature· 1 day ago

      CLASSIFICATION OF DECAPOD CRUSTACEANS.—In this well-defined group, the position of the anomurous forms (hermit-crabs, &c.) has often been the subject of doubt. The special ...