The Commens Dictionary
Quote from ‘Minute Logic: Chapter II. Prelogical Notions. Section I. Classification of the Sciences (Logic II)’
Nomological Psychology will treat of laws of mind subordinate to the general principles of final causation. I recognize in it but two Families, of which the one is devoted to the study of the great law of Association (including, of course, Fusion) or that of the mutual attraction of all ideas, the analogue of Gravitation in the Physical world, while the other analyzes the laws of the connection of body and mind.
‘Law of Association’ (pub. 26.07.15-11:13). 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-minute-logic-chapter-ii-prelogical-notions-section-i-classification-scienc-32.