The first things engineers developed were engines of was, i.e. the catapult. They started calling civil engineers civil to distinguish them from engineers that had a military purpose.
The Constitution is a document to give the right to do something, not to forbid something. There is nothing in the Constitution that gives the government the right to monitor anything.
He absolutely reinvented the light bulb. http://en.wikipedia.org/wiki/Henry_Woodward_(inventor) The only invention of note that he actually did himself was the phonograph, which admittedly had its' own impact. Edison took existing inventions from a staff , like Nikola Tesla, who worked under him and commercialized them. He was a good, even visionary, business man, like Jobs, not an amazing inventor like George Washington Carver or Nikola Tesla.
It does measure.
That is exactly what I'm using it for.