" Dialectic, however, or the vertex of the mathematical sciences, as it is called by Plato in his Republic, is that master discipline which particularly leads us up to an intelligible essence.

Taking this coast as the base of the triangle or Delta, and its vertex at Kirree, about 170 miles inland, where the Formosa branch separates, we have a space of upwards of 25,000 square miles, equal to the half of England.