A Guess at the Riddle (MS909; Essential Peirce 1, pp. 245-279; 1887-1888)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/guess/guess.htm]

A note from Peirce in response to Wright (1871.12.14)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_50/v2_50.htm]

A Practical Treatise on Logic and Methodology (MS165, Winter 1869-1870)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_35/v2_35.htm]

A System of Logic (MS169, Winter-Spring 1870)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_40/v2_40.htm]

Bain's Logic (review, 1870.8.4)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_43/v2_43.htm]

Cases Abstracted from Phantasms of the Living (excerpts)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v6/Cases.htm]

Chapter 2 (MS166, Winter 1869-1870)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_38/v2_38.htm]

Critique of Positivism (MS146, Winter 1867-1868)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_11/v2_11.htm]

Early nominalism and realism (lecture, MS158, November-December 1869)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_31/v2_31.htm]

Evolutionary Love (article: 1893)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/evolove/evolove.htm]

Existential Graphs (MS514 of 1909, with commentary by John Sowa)
(engl.)
at John F. Sowa
[www.jfsowa.com/peirce/ms514.htm]

Grounds of Validity of the Laws of Logic: Further Consequences of Four Incapacities (article 1869)
(engl.)
at Charles S. Peirce
[www.peirce.org/writings/p41.html]

Grounds of Validity of the Laws of Logic: Further Consequences of Four Incapacities (article 1869)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_23/v2_23.htm]

Harvard Lecture 1 (lecture, MS94, Spring 1865)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/earlymss/ms94harvard1.pdf]

How to Make our Ideas Clear (article: January 1878)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/ideas/id-frame.htm]

How to Make our Ideas Clear (article: January 1878, excerpt: parts II-IV)
(engl.)
at Marxists Internet Archive
[www.marxists.org/reference/subject/philosophy/works/us/peirce.htm]

Lessons in Practical Logic (MS164, Winter 1869-1870)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_34/v2_34.htm]

Logic, Regarded as Semeiotic (MSL75, The Carnegie application of 1902)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/l75/l75.htm]

Manuscript fragments in Volume 7 of the Collected Papers editorially entitled The Logic of 1873 (dated 1872-1873)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/1873logic/1873logic.htm]

New Elements (Kaina Stoicheia) (MS517; Essential Peirce 2, pp. 300-324; 1904)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/stoicheia/stoicheia.htm]

Nominalism versus Realism (article)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_14/v2_14.htm]

Notes for Lectures on Logic to be given 1st term 1870-71 (MS171, Spring 1870)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_42/v2_42.htm]

Obituary Review of and his work (review 1871.4.13 and review 1871.4.20)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_45/v2_45.htm]

Obituary Review of Charles Babbage and his work (review 1871.11.9)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_47/v2_47.htm]

Ockam (lecture, MS160, November-December 1869)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_32/v2_32.htm]

On a New List of Categories (Presented 1867.5.14, article: 1868)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/newlist/nl-frame.htm]

On a New List of Categories (Presented 1867.5.14, article: 1868)
(engl.)
at Charles S. Peirce
[www.peirce.org/writings/p32.html]

On a New List of Categories (Presented 1867.5.14, article: 1868)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_04/v2_4.htm]

On Hegel (excerpts)
(engl.,ed.: J. Buchler, Philosophical Writings of Peirce, Dover 1955)
at Marxists Internet Archive
[www.marxists.org/reference/subject/philosophy/works/us/peirce3.htm]

One, Two, and Three: A manuscript fragment (MS144, Summer-Fall 1867)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_09/v2_09.htm]

On Reality (MS194, Fall 1872)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/ms194/ms194.htm]

Potentia ex Impotentia (MS149, Summer 1868)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_19/v2_19.htm]

Practical Logic (MS165, Winter 1869-1870)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_37/v2_37.htm]

Preliminary Sketch of Logic (MS154, Fall 1869)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_28/v2_28.htm]

Professor Porter's Human Intellect (review 1869.3.18)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_24/v2_24.htm]

Questions Concerning Certain Faculties Claimed for Man (article 1868)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/question/qu-frame.htm]

Questions Concerning Certain Faculties Claimed for Man (article 1868)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_21/w2_21.htm]

Questions on Reality (MS148, Winter-Spring 1868)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_18/v2_18.htm]

Reasoning (ca. 1886-1889)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/reasoning/reasoning.htm]

Review of F. E. Abbot's Scientific Theism (review 1886.2.11)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/abbotreview.htm]

Review of Fraser's The Works of George Berkeley (review October 1871)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_48/v2_48.htm]

Review of Henry James, Sr.'s The Secret of Swedenborg (review April 1870)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_41/v2_41.htm]

Review of John Venn's The Logic of Chance (review July 1867)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_08/v2_08.htm]

Roscoe's Spectrum Analysis (lecture, 1869.7.22)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_26/v2_26.htm]

Rules for Investigation (MS165, Winter 1869-1870)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_36/v2_36.htm]

Some Consequences of Four Incapacities Claimed for Man (article 1868)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/conseq/cn-frame.htm]

Some Consequences of Four Incapacities Claimed for Man (article 1868)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_22/v2_22.htm]

The Categories (MS403, 1893)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/ms403/ms403.pdf]

The Doctrine of Necessity Examined (article: 1892)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/necessity/necessity.htm]

The English Doctrine of Ideas (review 1869.11.25)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_30/v2_30.htm]

The Fixation of Belief (article: November 1877)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/fixation/fx-frame.htm]

The Logic Notebook (MS140, March-December 1867)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_01/v2_1.htm]

Three trichotomies of Signs (i. 1902, ii. 1895, iii. 1893)
(engl.,ed.: J. Buchler, Philosophical Writings of Peirce, Dover 1955)
at Marxists Internet Archive
[www.marxists.org/reference/subject/philosophy/works/us/peirce2.htm]

Upon Logical Comprehension and Extension (Presented 1867.11.13)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_06/v2_06.htm]

What Is a Sign? (MS404, 1894)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/ep/ep2/ep2book/ch02/ep2ch2.htm]

What Is a Sign? (MS404, 1894)
(engl.)
at Marxists Internet Archive
[www.marxists.org/reference/subject/philosophy/works/us/peirce1.htm]

What is Meant by "Determined" (article 1868)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_16/v2_16.htm]

What Pragmatism is (article: April 1905)
(engl.)
at Arisbe: the peirce gateway
[www.cspeirce.com/menu/library/bycsp/whatis/whatpragis.htm]

Whewell (MS162, November-December 1869)
(engl.)
at Peirce Edition Project
[www.iupui.edu/~peirce/writings/v2/w2/w2_33/v2_33.htm]