Elements Which Are Similar As Regards Their

We Must Expect The Discovery Of Many As Yet Unknown Elements-for Example, Elements Analogous To Aluminum And Silicon- Whose Atomic Weight Would Be Between 65 And 75.

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There Is Nothing In This World That I Fear To Say.

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When The Elements Are Arranged In Vertical Columns According To Increasing Atomic Weight, So That The Horizontal Lines Contain Analogous Elements Again According To Increasing Atomic Weight, An Arrangement Results From Which Several General Conclusions May Be Drawn.