[6] Pearson, Karl:—“Skew Variation in Homogeneous Material;” Phil. Trans. 1895, Vol. CLXXXVI, A, pp. 253 et seq.

“On the Systematic Fitting of Curves to Observations and Measurements,” Biometrika, I, pp. 265 et seq. and Biometrika II, pp. 1 et seq.

Elderton:—“Frequency Curves and Correlation,” pp. 1-105; C. & E. Layton, 1906.

[7] Edgerton, F. Y.:—“On the Representation of Statistics by Means of Analytical Geometry,” Jour. Roy. Stat. Soc., 1914, Feb., Mar., May, June and July.

[8] Elderton, 1. c.

[9] Compare Edgeworth, “A Method of Representing Statistics by Analytical Geometry,” Proceedings Fifth International Congress of Mathematicians, Cambridge, 1912.

[10] Only a part of the original table appears in the accompanying table. The original values were computed to four places of decimals, but three place numbers are sufficient to illustrate the method of approximating to the solution.

[11] Compare “Tables for Statisticians and Biometricians,” Cambridge University Press, 1914.

[12] For the statistical details see Elderton, 1. c.

[13] As may be seen on examining the Table.