The Commens Dictionary
Quote from ‘A Syllabus of Certain Topics of Logic’
A collection composed of any line of identity together with all others that are connected with it directly or through still others is termed a ligature. Thus ligatures often cross cuts, and, in that case, are not graphs.
Peirce, 1903, p. 18; CP 4.407
‘Ligature’ (pub. 18.03.18-15:37). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-syllabus-certain-topics-logic-27.