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    • Micro Determination of Calcium - Nature

      Nature· 4 days ago

      I AM grateful to Dr. G. J. van Kolmeschate, of the Analytical Institute, Delft, and to Drs. H. A. Flaschka and A. J. Barnard, jun., of the Georgia Institute of Technology, ...

    • Packing of Spheres - Nature

      Nature· 4 days ago

      SCOTT1 has described experiments with equi-sized steel balls of 0.3175 cm. The specific gravity of steel is high, and this may have had an influence on the arrangement of the spheres, as the ...