ABSTRACT
6.1. Boole and the older logics of Aristotle and of Hamilton-De Morgan. Now that the four currents of thought named in 2.1 have been talked about, we may have a look at that stretch of Mathematical Logic which their motion and driving-force have so far produced; as one might say, the look will be given from the footway at the side of the river and not from the point of view of one having a swim underwater, because clearly we are not able to go deeply into Mathematical Logic here.
