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The author has endeavored, in the following treatise, to give a clear, concise, and systematic development of the principles of Logic. Care has been taken to retain the valuable results of the labors of former investigators--results which the world can not afford to lose; yet much will be found that is new, not only in the methods, but also in the matter. The works of the following authors have been examined: Aristotle, Hamilton, Mill, De Morgan, Thompson, Mansel, Whately, Wilson, Tappan, Mahan, Day, McGregor, True, and Coppée. To Hamilton, the author is especially indebted for valuable aid in reference to the following subjects: Classification of Science, General Outline, Concepts, and Modified Logic; and to Mill, for examples illustrating the four experimental methods of investigation. It has been kept steadily in mind that the work is designed for a text-book; and, in accordance with this design, a topical arrangement has been given to the matter, so as to adapt it to the topical method of conducting recitations, which, when followed up by appropriate questions, is, of all methods, the best for the grade of students who will pursue the study of Logic. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

Comprehension (Theory of knowledge)

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This book is an attempt to reach the simplest elements which by their combination generate the manifold complexity of our mental states, and to assign the laws of those elements, and the elementary laws of their combination, from which laws, the subordinate ones which govern the compound states are consequences and corollaries. The phenomena of the Mind include multitudes of facts, of an extraordinary degree of complexity. By observing them one at a time with sufficient care, it is possible in the mental, as it is in the material world, to obtain empirical generalizations of limited compass, but of great value for practice. When, however, we find it possible to connect many of these detached generalizations together, by discovering the more general laws of which they are cases, and to the operation of which in some particular sets of circumstances they are due, we gain not only a scientific, but a practical advantage; for we then first learn how far we can rely on the more limited generalizations; within what conditions their truth is confined; by what changes of circumstances they would be defeated or modified.

Knowledge, Theory of. --- Intellect.