‘Semeiotic’ (pub. 19.08.13-18:28). 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-teleological-logic-4.
Quote:
… Science is divided into
1 Positive Science. Or the science of things.
2 Semiotic. Or the science of representations.
3 Formal Science. Or the science of forms.
Source:
Peirce, C. S. (1865). Teleological Logic. MS [W] 108; MS [R] 802.
URL:
http://www.commens.org/dictionary/entry/quote-teleological-logic-4