Letter to Circular]
4. A Few Specimens of Exercises in the Art of Reasoning
7. [Orientation Letter to Marie Noble]
8. [Letter to Noble on the Nature of Reasoning]
9. [Reasoning Exercises: Number Series, Relational Graphs, and Card Games]
10. Boolian Algebra [Three Lessons]
11. [Two Letters from J. B. Loring on Algebra Lessons]
13. [Additional Exercises in Boolian Algebra]
THE PEIRCE-GURNEY DISPUTE OVER PHANTASMS OF THE LIVING
17. Remarks on Professor Peirce’s Paper (by E. Gurney)
19. Remarks on Mr. Peirce’s Rejoinder (by E. Gurney)
24. [Chapter III.] The Triad in Metaphysics
25. Chapter IV. The Triad in Psychology
26. Chapter V. The Triad in Physiology
27. Chapter VI. The Triad in Biological Development
28. Chapter VII. The Triad in Physics
30. Pendulum Observations at Fort Conger
31. Reflections on the Logic of Science
32. Note on the Analytical Representation of Space as a Section of a Higher Dimensional Space
35. Review of Stock’s Deductive Logic
36. Report on Gravity at the Smithsonian, Ann Arbor, Madison, and Cornell
39. On the Numbers of Forms of Sets
40. The Formal Classification of Relations
42. Notes on Geometry of Plane Curves without Imaginaries
43. Review of Noel’s The Science of Metrology
45. Herbert Spencer’s Philosophy
46. Review of Collins’s Epitome of the Synthetic Philosophy
