[18]. Hans Breitmann is symbolic of those who “solved the infinite as one eternal sphere.”

[19]. See Journal of Speculative Philosophy, Vol. 2, pp. 155-157, article on A New List of Categories in the Proceedings of the American Academy of Arts and Sciences, Vol. 7, 287-298 and article on Sign, in Baldwin’s Dictionary.

[20]. Studies in Logic, p. 181.

[21]. Monist, Vol. 7, p. 27. Cf. Journal of Speculative Philosophy, Vol. 2, p. 207; Popular Science Monthly, Vol. 58, pp. 305-306.

[22]. This vol., p. [15].

[23]. Suggestive for a theory of the metaphysics of fictions is the suggestion (p. 46) “that the question of what would occur under circumstances which do not actually arise, is not a question of fact, but only of the most perspicuous arrangement of them.” This arrangement is, of course, not merely subjective.

[24]. Pp. 128-129, cf. Monist, Vol. 7, p. 206, and Logical Studies, pp. 175 ff.

[25]. From the Journal of Speculative Philosophy, vol. 2, p. 140.

[26]. Popular Science Monthly, November, 1877.

[27]. [This is substantially the dictum of Harvey to John Aubrey. See the latter’s Brief Lives (Oxford ed. 1898) I 299.]