Variation of the Atomic Weights

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THE annexed list contains all the elements except a few very A little investigated. If the whole numbers in columns are taken to be each the weight of nine atoms in the gaseous state, and a comparison is made with the best determinations of vapour-densities on record, the result is as follows. The first nineteen determinations are Deville and Troost's, and are to be found in Comptes Rendus, xlv. (1857) p. 823; lvi. (1863) p. 893; lx. (1865) p. 1222; lxiii. (1866) p. 20.

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  1. 1

    Proc. Roy. Soc. xxvii. p. 427.

  2. 2

    Journ. Chem. Soc. v. p. 69.

  3. 3

    The experimental values are those recalculated by Prof. F. W. Clarke ("Smithsonian Miscell. Coll.," vol. xxvii.).

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