[12] _Cf. Distribution of Wealth_, chaps, xii, xiii, vii, viii; _Essentials_, chaps, v-x. [13] _Essentials_, p. 158. [14] _Distribution_, chap. xxiv. [15] Chap. xxiv. [16] _Essentials_, p. 40. [17] Among modern economic hedonists, including Mr. Clark, there stands over from the better days of the order of nature a presumption, disavowed, but often decisive, that the sensational response to the like mechanical impact of the stimulating body is the same in different individuals. But, while this presumption stands ever in the background, and helps to many important conclusions, as in the case under discussion, few modern hedonists would question the statement in the text. [18] _Distribution_, p. 394. [19] In Mr. Clark's discussion, elsewhere, the "quasi"-character of the productive share of the laborer is indicated by saying that it is the product "imputed" or "imputable" to him. [20] _Essentials_, p. 92. Et si sensus deficit, ad firmandum cor sincerum sola fides sufficit. [21] See pp. 102-113; also p. 172, note. [22] "The cheapest and poorest grades of articles." Page 113. [23] See p. 113. [24] The disappearance, and the method of disappearance, of such elements of differential utility and disutility occupies a very important place in all marginal-utility ("final-utility") theories of market value, or "objective value." [25] "Only the simplest and cheapest things that are sold in the market at all bring just what they are worth to the buyers." Page 113. [26] It is, _e.g._, open to serious question whether Mr. Clark's curves of final productivity (pp. 139, 148), showing a declining output per unit in response to an increase of one of the complementary agents of production, will fit the common run of industry in case the output be counted by weight and tale. In many cases they will, no doubt; in many other cases they will not. But this is no criticism of the curves in question, since they do not, or at least should not, purport to represent the product in such terms, but in terms of utility. [27] To resort to an approximation after the manner of Malthus, if the supply of goods be supposed to increase by arithmetical progression, their final utility may be said concomitantly to decrease by geometrical progression. [28] _Cf. Essentials_, chap. iii, especially pp. 40-41.