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The last living signer of the Declaration of Independence, Charles Carroll, called this &#171among the most important acts of my life, second only to that of signing the Declaration of Independence, i

  • Sending the first telegraph message
  • Launching the first marine torpedo
  • Christening the first multi-tubular-boiler locomotive
  • Breaking ground for America's first passenger railway
  • Throwing the switch on the first electric printing press