[119] See the discussion of Simmel's contention, supra, p. 19, n.
[120] Ehrenfels, C., System der Werttheorie, Leipzig, 1897; Kreibig, J. C., Psychologische Grundlegung eines Systems der Werttheorie, Vienna, 1902; Kallen, H. M., "Dr. Montague and the Pragmatic Notion of Value," Jour. of Philosophy, etc., Sept., 1909; Montague, W. P., "The True, the Good and the Beautiful, from a Pragmatic Standpoint," Ibid., April 29, 1909; Meinong, A., Psychologisch-ethische Untersuchungen zur Werttheorie, Graz, 1894; Paulsen, Friedrich, Introduction to Philosophy, and System of Ethics; Stuart, H. W., "The Hedonistic Interpretation of Subjective Value," Jour. of Pol. Econ., vol. iv, "Valuation as a Logical Process," in Dewey's Studies in Logical Theory, Chicago, 1903; Shaw, C. C., "The Theory of Value, and its Place in the History of Ethics," International Jour. of Ethics, vol. xi; Slater, T., "Value in Moral Theology and Political Economy," Irish Eccles. Rec., ser. 4, vol. x, Dublin, 1901; Tufts, J. H., "Ethical Value," Jour. of Philosophy, etc., vol. xix; Baldwin's Dictionary of Philosophy, etc., s. v. "Worth" (article by W. M. Urban); Simmel, G., Philosophie des Geldes, Leipzig, 1900, "A Chapter in the Philosophy of Value," Amer. Jour. of Sociology, vol. v; Urban, W. M., Valuation, London, 1909. These titles are representative of an extensive literature on the subject.
[121] Supra, p. 19, n.
[122] I am indebted to Professor John Dewey for many valuable suggestions and criticisms in connection with this part of my study. My more general obligations to him will be manifest to any one who is familiar with his epoch-marking point of view. Economic, sociological and political philosophy have, in my judgment, more to learn from him than from any other contemporary philosopher.
[123] Pp. 141-42.
[124] Cf. Gabriel Tarde, Psychologie Économique, vol. i, p. 63, and Urban, Valuation, p. 78.
[125] Urban, op. cit., p. 32.
[126] Paulsen, Friedrich, Ethics, passim.
[127] System der Werttheorie, vol. i, chap. i.
[128] Op. cit., p. 311.