A System of Logic, Ratiocinative and Inductive: Being a Connected View of the Principles of Evidence and the Methods of Scientific Investigation, Volume 1

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Longmans, Green, and Company, 1865 - Knowledge, Theory of - 1096 pages
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The same Subject continued
Examination of some Opinions opposed
Preliminary Observations on Induction in general
Inductions distinguished from verbal transformations
Of Laws of Nature
Of the Law of Universal Causation
Of the Composition of Causes
Of Observation and Experiment
Of the Four Methods of Experimental Inquiry 1 Method of Agreement
Method of Difference
Mutual relation of these two methods 4 Joint Method of Agreement and Difference
Method of Residues 6 Method of Concomitant Variations 7 Limitations of this last method 427 430 431 435
Miscellaneous Examples of the Four Methods 1 Liebigs theory of metallic poisons
Theory of induced electricity
Dr Wells theory of dew
Dr BrownSoquards theory of cadaveric rigidity
Examples of the Method of Residues
Of Plurality of Causes and of the Intermixture qf EJfects
One effect may hare several causes
Plurality of Causes how ascertained
Concurrence of Causes which do not compound their effects
Difficulties of the investigation when causes compound their effects
Three modes of investigating the laws of complex effects
The method of simple observation inapplicable
The purely experimental method inapplicable
Of the Deductive Method 1 First stage ascertainment of the laws of the separate causes by direct induction
Second stage ratiocination from the simple laws of the complex cases
Third stage verification by specific experience

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Page 430 - 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.
Page 431 - 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.
Page 439 - 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.
Page 366 - To certain facts, certain facts always do, and, as we believe, will continue to, succeed. The invariable antecedent is termed the cause ; the invariable consequent the effect. And the universality of the law of causation consists in this, that every consequent is connected in this manner with some particular antecedent or set of antecedents.
Page 344 - It would yet be a great error to offer this large generalization as any explanation of the inductive process. On the contrary, I hold it to be itself an instance of induction, and induction by no means of the most obvious kind.
Page 352 - Why is a single instance, in some cases, sufficient for a complete induction ; while in others, myriads of concurring instances, without a single exception known or presumed, go such a very little way towards establishing a universal proposition ? Whoever can answer this question, knows more of the philosophy of logic than the wisest of the ancients, and has solved the problem of induction.
Page 443 - 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.
Page 479 - The business of Inductive Logic is to provide rules and models (such as the Syllogism and its rules are for ratiocination) to which if inductive arguments conform, those arguments are conclusive, and not otherwise.
Page 149 - The simplest and most correct notion of a Definition is, a proposition declaratory of the meaning of a word...
Page 23 - names ordered in speech (as is defined) are signs of our conceptions, it is manifest they are not signs of the things themselves ; for that the sound of this word stone should be the sign of a stone, cannot be understood in any sense but this, that he that hears it collects that he that pronounces it thinks of a stone.

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