Quoted By:
"Some of the greatest minds in the history of science, including Kepler, Halley, and Euler, had speculated as to the existence of a so-called 'hollow Earth.' One day, it was hoped, the technique of intra-planetary 'short-cutting' about to be exercised by the boys would become routine, as useful in its way as the Suez or the Panama Canal had proved to surface shipping."
