puzzle----the habit of arranging your ideas in an orderly and get-at-able form----and, more valuable than all, the power to detect _fallacies_, and to tear to pieces the flimsy illogical arguments, which you will so continually encounter in books, in newspapers, in speeches, and even in sermons, and which so easily delude those who have never taken the trouble to master this fascinating Art. _Try it._ That is all I ask of you! L. C. 29, BEDFORD STREET, STRAND. _February 21, 1896._ pg-xiv pg-xv CONTENTS. =BOOK I.= =THINGS AND THEIR ATTRIBUTES.= CHAPTER I. _INTRODUCTORY._ PAGE '=Things=' 1 '=Attributes=' " '=Adjuncts=' " CHAPTER II. _CLASSIFICATION._ '=Classification=' 1½ '=Class=' " '=Peculiar=' Attributes " '=Genus=' " '=Species=' " '=Differentia=' " '=Real=' and '=Unreal=', or '=Imaginary=', Classes 2 '=Individual=' " A Class regarded as a single Thing 2½ pg-xvi CHAPTER III. _DIVISION._ § 1. _Introductory._ '=Division=' 3 '=Codivisional=' Classes " § 2. _Dichotomy._ '=Dichotomy=' 3½ Arbitrary limits of Classes " Subdivision of Classes 4 CHAPTER IV. _NAMES._ '=Name=' 4½ '=Real=' and '=Unreal=' Names " Three ways of expressing a Name " Two senses in which a plural Name may be used 5 CHAPTER V. _DEFINITIONS._ '=Definition=' 6 Examples worked as models " pg-xvii =BOOK II.= =PROPOSITIONS.= CHAPTER I. _PROPOSITIONS GENERALLY._ § 1. _Introductory._ Technical meaning of "some" 8 '=Proposition=' "