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| Montage © Roy R. Behrens |
[Thomas] Edison was very proud. He enjoyed showing visitors around his property, pointing out the various laborsaving devices. At one point it was necessary to pass through a turnstile in order to take the main path back to the house. Considerable effort was needed to move the turnstile. A guest asked Edison why it was that, with all the other clever gadgets around, he had such a heavy turnstile. Edison replied , "Well, you see, everyone who pushes the turnstile around pumps eight gallons of water into the tank on my roof."
