[10] It may be interesting to point out that the like identification of the categories of normality and right gives the dominant note of Mr. Spencer's ethical and social philosophy, and that later economists of the classical line are prone to be Spencerians.

[11] "Normal value (called by Adam Smith and Ricardo 'natural value,' and by Mill 'necessary value,' but best expressed, it seems to me, by the term which I have used)." Leading Principles (New York), p. 45.

[12] Leading Principles, p. 45.

[13] Scope and Method of Political Economy (London, 1891), chaps. i and ii.

[14] Character and Logical Method; e.g., Lecture II, especially pp. 53, 54, and 71.

[15] Scope and Method of Political Economy, chap. iii, particularly p. 97.

[16] "Interest" is, of course, here used in the sense which it has in modern psychological discussion.

[17] Scope and Method of Political Economy, p. 46.

[18] Principles of Economics, Vol. I, Book I, chap, vi, sect. 6, especially p. 105 (3d edition).

[19] See, e.g., Professor Marshall's "Reply" to Professor Cunningham in the Economic Journal for 1892, pp. 508-113.