THREE:3113. The vertical movement of material, although it consumes more power, is more economical than horizontal handling, because less floor room and ground surface is required. FORE:We have seen how Prodicus and Hippias professed to97 teach all science, all literature, and all virtuous accomplishments. We have seen how Protagoras rejected every kind of knowledge unconnected with social culture. We now find Gorgias going a step further. In his later years, at least, he professes to teach nothing but rhetoric or the art of persuasion. We say in his later years, for at one time he seems to have taught ethics and psychology as well.73 But the Gorgias of Plato��s famous dialogue limits himself to the power of producing persuasion by words on all possible subjects, even those of whose details he is ignorant. Wherever the rhetorician comes into competition with the professional he will beat him on his own ground, and will be preferred to him for every public office. The type is by no means extinct, and flourishes like a green bay-tree among ourselves. Like Pendennis, a writer of this kind will review any book from the height of superior knowledge acquired by two hours�� reading in the British Museum; or, if he is adroit enough, will dispense with even that slender amount of preparation. He need not even trouble himself to read the book which he criticises. A superficial acquaintance with magazine articles will qualify him to pass judgment on all life, all religion, and all philosophy. But it is in politics that the finest career lies before him. He rises to power by attacking the measures of real statesmen, and remains there by adopting them. He becomes Chancellor of the Exchequer by gross economical blundering, and Prime Minister by a happy mixture of epigram and adulation.