Abstract
THE above authors have been good enough to show me their letter. The 1934 Conference was concerned with a substitute for the bio-assay with its experimental error of perhaps ± 25 per cent for individual assays. The fact that variations of a few per cent for spectrophometric assays in different solvents like alcohol and cyclohexane are now being noted is an indication of the progress made. Such variations are usual for polar molecules and do not invalidate the spectrophotometric method.
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Smakula and Wassermann, Z. phys. Chem., A, 155, 353 (1931).
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MORTON, R. Letters to Editor. Nature 141, 552 (1938). https://doi.org/10.1038/141552a0
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DOI: https://doi.org/10.1038/141552a0
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