Abstract
DOUBTLESS all teachers of experience are agreed that in dealing with the measurable quantities considered in mathematics and physics there is great difficulty in giving to students a clear idea, of the quantities measured unless a definite name be given to the unit in terms of which measurement is made.
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BARRELL, F. The Unit of Momentum. Nature 88, 144 (1911). https://doi.org/10.1038/088144a0
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DOI: https://doi.org/10.1038/088144a0