
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 Augustus De Morgan's formulation of the logic of relations. The former episode has been studied extensively; the latter,...

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 Augustus De Morgan's formulation of the logic of relations. The former episode has been studied extensively; the latter,...