The Commens Dictionary
Quote from ‘Sketch of Dichotomic Mathematics’
A Convention would be a proposition concerning a subject which we imagine to exist as an aid in drawing conclusions concerning our main subject; and any such proposition would be a Convention.
‘Convention [in Logic]’ (pub. 20.11.15-10:07). 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-sketch-dichotomic-mathematics-9.