Abstract
PROF. F. G. DONNAN has submitted1 a very interesting application of the exponential function. I think, however, that his first equation is not altogether accurate. I suggest that the following is rather more realistic.
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NATURE, 153, 142 (1944).
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ROBERTS, G. Achilles and the Tortoise. Nature 153, 464 (1944). https://doi.org/10.1038/153464b0
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DOI: https://doi.org/10.1038/153464b0
