‘Line of Identity’ (pub. 18.03.18-13:26). 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-graphs-little-account-r-7.
Quote:
A heavily marked continuous line on the sheet of assertion shall assert that the individuals denoted by its two extremities are identical. [—]
Such a line is called a line of identity.
Source:
Peirce, C. S. (1903). Graphs, Little Account [R]. MS [R] S27.
URL:
http://www.commens.org/dictionary/entry/quote-graphs-little-account-r-7