On the Temperature Dependence of Ferro-Magnetic Saturation.

1 C. Spearman, Abilities of Man, Their Nature and Measurement, Macmillan, 1927; see Appendix, p. viii. 2 H. T. H. Piaggio, Brit. J. Psychol., 24, 88-105 (1933) states the matter clearly (p. 104) when in discussing Kelley's tests he says: "However, in deciding what tests to retain we make the tetrad relations the criterion, and not preconceived notions about dissimilarity of tests; indeed in the table below we retain three forms of memory test." Now unless memory be the general g, it would seem as though memory for words, memory for meaningful symbols and memory for meaningless symbols should have in common some general memory factor in addition to g, but they do not. aFor notation see E. B. Wilson, these PROCEEDINGS, 19, 768, 882 (1933), and preceding papers. 4 T. L. Kelley, Crossroads in the Mind of Man: A Study of Differentiable Mental Abilities, Stanford Univ. Press, 1928.