Preface		xiii
Chronology		xix
Bibliographical Abbreviations in Editorial Matter		xxiii
Introduction		xxv
1.	Boolian Algebra-Elementary Explanations	1
	CORRESPONDENCE COURSE ON THE ART OF REASONING
2.	[Circular for Course on the Art of Reasoning]	10
3.	[Follow-up Letter to Circular]	15
4.	A Few Specimens of Exercises in the Art of Reasoning	19
5.	Directions to Agents	21
6.	[Letter to New Students]	33
7.	[Orientation Letter to Marie Noble]	35
8.	[Letter to Noble on the Nature of Reasoning]	37
9.	[Reasoning Exercises: Number Series, Relational Graphs, and Card Games]	41
10.	Boolian Algebra [Three Lessons]	50
11.	[Two Letters from J. B. Loring on Algebra Lessons]	54
12.	[Reply to Loring]	56
13.	[Additional Exercises in Boolian Algebra]	58
14.	[Science and Immortality]	61
15.	Logical Machines	65
	THE PEIRCE-GURNEY DISPUTE OVER PHANTASMS OF THE LIVING
	Cases Abstracted from Phantasms of the Living
16.	Criticism on Phantasms of the Living: An Examination of an Argument of Messrs. Gurney, Myers, and Podmore	74
17.	Remarks on Professor Peirce's Paper (by E. Gurney)	82
18.	Mr. Peirce's Rejoinder	101
19.	Remarks on Mr. Peirce's Rejoinder (by E. Gurney)	142
20.	Number	155
21.	Logic of Number	156
	A GUESS AT THE RIDDLE
22.	[Contents]	166
23.	Chapter I. Trichotomy	168
24.	[Chapter III.] The Triad in Metaphysics	181
25.	Chapter IV. The Triad in Psychology	182
26.	Chapter V. The Triad in Physiology	188
27.	Chapter VI. The Triad in Biological Development	199
28.	Chapter VII. The Triad in Physics	203
29.	[Trichotomic]	211
30.	Pendulum Observations at Fort Conger	216
31.	Reflections on the Logic of Science	246
32.	Note on the Analytical Representation of Space as a Section of a Higher Dimensional Space	260
33.	Ordinal Geometry	263
34.	[Mathematical Monads]	268
35.	Review of Stock's Deductive Logic	271
36.	Report on Gravity at the Smithsonian, Ann Arbor, Madison, and Cornell	275
37.	[Reasoning]	354
38.	On a Geometrical Notation	357
39.	On the Numbers of Forms of Sets	360
40.	The Formal Classification of Relations	363
41.	Dual Relatives	368
42.	Notes on Geometry of Plane Curves without Imaginaries	372
43.	Review of Noel's The Science of Metrology	377
44.	[Logic and Spiritualism]	380
45.	Herbert Spencer's Philosophy	395
46.	Review of Collins's Epitome of the Synthetic Philosophy	401
47.	"Outsider" Wants More Light	402
Editorial Symbols		413
Annotations		417
Bibliography of Peirce's References		506
Chronological Catalog, January 1887-April 1890		512
Supplement to W5 Chronological List, 1884-1886		531
Essay on Editorial Theory and Method		534
Textual Apparatus		557
Headnotes, Textual Notes, Emendations, Rejected   Substantives, Alterations, Line-End Hyphenation
Line-End Hyphenation in the Edition Text		672
Index		673