Outlines of Logic

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D. Appleton, 1888 - 137 páginas

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Página 110 - If an instance in which the phenomenon under investigation occurs, and an instance in which it does not occur, have every circumstance in common save one, that one occurring only in the former; the circumstance in which alone the two instances differ is the effect, or the cause, or an indispensable part of the cause, of the phenomenon.
Página 112 - Subduct from any phenomenon such part as is known by previous inductions to be the effect of certain antecedents, and the residue of the phenomenon is the effect of the remaining antecedents.
Página 110 - If two or more instances of the phenomenon under investigation have only one circumstance in common, the circumstance in which alone all the instances agree is the cause (or effect) of the given phenomenon.
Página 108 - In Sir Humphry Davy's experiments upon the decomposition of water by galvanism, it was found that (besides the two components of water — oxygen and hydrogen) an acid and an alkali were developed at the two opposite poles of the machine. As the theory of the analysis of water did not give reason to expect these products, they were a residual phenomenon, the cause of which was still to be found.
Página 14 - Par ma foi, il ya plus de quarante ans que je dis de la prose, sans que j'en susse rien; et je vous suis le plus obligé du monde de m'avoir appris cela.
Página 112 - Whatever phenomenon varies in any manner whenever another phenomenon varies in some particular manner, is either a cause or an effect of that phenomenon, or is connected with it through some fact of causation.
Página 108 - Davy conjectured that there might be some hidden cause of this portion of the effect ; the glass vessel containing the water might suffer partial decomposition, or some foreign matter might be mingled with the water, and the acid and alkali be disengaged from it, so that the water would have no share in their production. Assuming 'this, he proceeded to try whether the total removal of the cause...
Página 43 - is a definite combination of heterogeneous changes, both simultaneous and successive, in correspondence with external coexistences and sequences.
Página 123 - Thou shalt not make to thyself any graven image, nor the likeness of anything that is in the heaven above, or in the earth beneath, or in the water under the earth.

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