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  1.  20
    Viii. Telegraphic determination of the longitude of Kimberley.W. L. Elkin - 1881 - Transactions of the Royal Society of South Africa 3 (2):26-26.
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    X. the polarizing photometer and its application to α centauri.W. L. Elkin - 1881 - Transactions of the Royal Society of South Africa 3 (2):29-30.
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    Iv. elements of the great comet 1882.W. H. Finlay & W. L. Elkin - 1881 - Transactions of the Royal Society of South Africa 3 (2):14-14.
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