Lincoln's Oak Ridge Cemetery tomb in Illinois is going to be heated and cooled with a brand new $282,000 geothermal energy system.
We think this is particularly appropriate for the Lincoln Tomb because Abraham Lincoln is the only president to hold a U.S. patent," [Illinois Historic Preservation Agency spokesman David] Blanchette said. "He was fascinated by the latest inventions and the latest technology, so we certainly think it's appropriate to use this latest green technology on his final resting place."
Lincoln's patent was for a device to help free riverboats that got stuck on sandbars.
