内容简介：
Purchase one of 1st World Library's Classic Books and help support our free internet library of downloadable eBooks. Visit us online at www.1stWorldLibrary.ORG - - The Old Man and the Young Man had been conversing. The Old Man had asserted that the human being is merely a machine, and nothing more. The Young Man objected, and asked him to go into particulars and furnish his reasons for his position.] Old Man. What are the materials of which a steam-engine is made? Young Man. Iron, steel, brass, white-metal, and so on. O.M. Where are these found? Y.M. In the rocks. O.M. In a pure state? Y.M. No - in ores. O.M. Are the metals suddenly deposited in the ores?