The Principles of Empirical Or Inductive Logic

From the preface to the first edition: It will be seen that I have made comparatively slight reference to other, and especially to contemporary writers. In my former works the opposite course was adopted, but for special reasons. As regards Probability, much had recently been produced which was only accessible in scattered numbers of various scientific journals, and every student knows how apt these are to be overlooked unless special attention be directed to them. And as regards Symbolic Logic,