A. MS. notebook
Two volumes comprise the fourth lecture, with the first volume entitled "Gamma Part of Existential Graphs." Volumes I and II (pp. 1-96) published as 4.510-529, with deletions. Deleted: brief history of exact logic, i.e., logic begun by De Morgan, including CSP's entitative and existential graphs (pp. 8-18). Opium's dormitive virtue abstraction, including Hegel's abuse of the term (pp. 66-78).
Abstraction, DeMorgan Augustus, Graphs existential, Hegel Georg W. F., Logic (modal see Modality), history of Logic, Opium dormitive virtue of, Lowell Lectures