Demands increasing and again increasing, year after year, forced the steam engine to grow in order to meet its responsibilities.

There were men living in Philadelphia in 1876, who had known Oliver Evans personally; at least one old man at the Centennial Exhibition had himself seen the Oruktor Amphibolos and recalled the consternation it had caused on the streets of the city in 1804.

It seemed a far cry back to the Oruktor from the great and beautiful engine, designed by George Henry Corliss, which was then moving all the vast machinery of the Centennial Exhibition.

But since then achievements in steam have dwarfed even the great work of Corliss.

And to do a kind of herculean task that was hardly dreamed of in 1876 another type of engine has made its entrance: the steam turbine, which sends its awful energy, transformed into electric current, to light a million lamps or to turn ten thousand wheels on distant streets and highways..