Abstract
Two generalisations seem to have been staring us in the face for some time, and yet I have seen no one give them a look of recognition; they may be phantasms, but they seem solid enough:—
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PETRIE, W. Two Generalisations. Nature 32, 597 (1885). https://doi.org/10.1038/032597b0
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DOI: https://doi.org/10.1038/032597b0
