[138] Öttingen: Die Moralstatistik. Erlangen 1882.
[139] James Sully: “Die Illusionen” in Vol. 62 of the Internation. Wissenschft. Bibliothek. Leipzig 1884.
[140] Th. Lipps: Grundtatsachen des Seelenlebens. Bonn 1883.
[141] Manual for Examining Justices.
[142] B. Petronievics: Der Satz vom Grunde. Leipzig 1898.
[143] Of course we mean by “proof” as by “certainty” only the highest possible degree of probability.
[144] Locke: Essay on the Human Understanding.
[145] Laplace: Essay Philosophique sur les Probabilités. Paris 1840.
[146] Venn: The Logic of Chance.
[147] Philos. Versuch über die Wahrscheinlichkeiten. Würsburg 1883.