. Lectures on metaphysics and logic . 84, p. 128. Schulze, Logik, § 50. in Summufas, Tract, i. f. 9 b. —, i 180 I may here, likewise, sho-w you one, and perhaps the best, mode,in which these different forms can be expressed by The invention of this mode of sensualizing by circles the abstrac-tions of Logic, is generally given to Euler, whoemploys it in his Letters to a German Princesson different Matters of Physics and Philoso2yliy}But, to say nothing of other methods, this bycircles is of a much earlier origin. For I findit in the Nucleus Zogicce Weisianm, which ap-
. Lectures on metaphysics and logic . 84, p. 128. Schulze, Logik, § 50. in Summufas, Tract, i. f. 9 b. —, i 180 I may here, likewise, sho-w you one, and perhaps the best, mode,in which these different forms can be expressed by The invention of this mode of sensualizing by circles the abstrac-tions of Logic, is generally given to Euler, whoemploys it in his Letters to a German Princesson different Matters of Physics and Philoso2yliy}But, to say nothing of other methods, this bycircles is of a much earlier origin. For I findit in the Nucleus Zogicce Weisianm, which ap-peared in 1712; but this was a posthumous publication, and theauthor, Christian Weise, who was Rector of Zittau, died in may notice, also, that Lamberts method ofaccomplishing the same end, by parallel linesof different lengths, is to be found in the Logicof Alstedius, published in 1614, consequentlyabove a century and a half prior to Lamberts Neues OfLamberts originality there can, however, I think, be no doubt; forhe was exceedingly curious about, and not overlearned in, the his-tory of these subsidia, while in his philosophical correspondencemany other inventions of the kind, of far inferior interest, arerecorded, but there ilecturesonmeta02hami
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