CuSO4 Method of Phillips et at.(1943).-Asan indication of the ease and speed of this method it may be remarked that once the saturated solut-on of copper sulphate had been prepared the whole procedure of making the separate dilutions and finding the specific gravities of the plasmas took only four hours.Results The values for the total plasma nitrogen of the 45 boys are given here in the form of a distribution diagram.Z3 20 -MEAN ..-_--TDTAL PLASMA N IN 9J ER 1OOmiThe distribution of total plasma nitrogen in a group of 45 boys.
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Pickerill et al. (1945) studied this question.