PREFACE. THE object of the following work is to serve as an introduction to that branch of scientific method which is known as Induction. It is designed mainly for the use of those who have not time or opportunity to consult larger works, or who require some preliminary knowledge before they can profitably enter upon the study of them. To the works of Mr. Mill, Dr. Whewell, and Sir John Herschel, the Author must, once for all, express his obligations. 'He has, however,' if he may be allowed to repeat the language already employed in the Preface to his Manual of Deductive Logic,' endeavoured, on all disputed points, to reason out his own conclusions, feeling assured that no manual, however elementary, can be of real service to the student, unless it express what may be called the "reasoned opinions" of its author.' The analysis of Induction presents far more difficulties than that of Deduction, and requires to be illustrated b |