This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the publi

Excerpt from Memoir of Augustus De Morgan: With Selection From His Letters Should any portion of what I have written appear un called for, it must be remembered

The middle years of the nineteenth century saw two crucial develop ments in the history of modern logic: George Boole's algebraic treat ment of logic and August