Elevators—in one form or another—have been used to make human life easier since ancient times. They were once just simple hoists but are now incredibly complex mechanical systems. One of the most significant advances came in 1853 with the invention of a safety device to prevent elevators from plummeting in the event of cable failure. Four years later, the first passenger elevator was installed, paving the way for taller buildings and the urban geography of modern cities. Where was it installed? Discuss (http://forum.thefreedictionary.com/postst34863_First-Passenger-Elevator-Installed--1857-.aspx)
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