Abstract
In the paper by E. J. King in the Supplement to the August, 1957, issue of CLINICAL CHEMISTRY (Vol.3, No.4, Part Two), pages 510 and 511 do not appear. This is due to an error in pagination only, and the text is complete and in proper order. In the same paper, the insert consisting of Figs. 1 and 5, which should have appeared between pages 508 and 509, was incorrectly placed and will be found between pages 546 and 547.
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