Abstract
THE note in NATURE of April 11, p. 408, on “Quality Control in Manufacture”, repeats an error made in the article on which the note is based. Prof. R. A. Fisher has made many notable contributions to statistical theory and practice, and his elegant analysis of variance may possibly be considered the outstanding contribution of the century, but I think he would be the last to agree with the statement made in the opening phrases of the second sentence of the note. The theoretical foundations on which the control charts for averages of samples is based have been long known, and those for control charts for measures of variability have been laid by the work of British statisticians other than Prof. Fisher.
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