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Classification of the Sci.
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deutic, the science of the art of discovering, be conducted as a separate science, as to some extent it has been, and not as one of the avocations of the logician, it is par excellence the science that is ministrant to the Gnostic Instinct. Such books as Jean Senebier's 'L'art d'observer' (2 vols. Genève 1775) and Catherine Aiken's admirable 'Methods of Mind Training' (Harpers: 1896) treat of this science.

Sciences of Industry

When man acts mainly for the purpose of gratifying some desire,—and the word 'mainly' here recognizes that in a secondary way he generally aims at gratifying that instinct that is his motive,—it is most commonly somebody else's gratification that he seeks, as it invariably is the gratification of some other wish than the wish that moves him to act. We might, there-