visit, in 1923, he was reportedly shocked to find his old home still lit by lamps and candles. Death Edison died of complications of diabetes on October 18, 1931, in his home, "Glenmont" in Llewellyn Park in West Orange, New Jersey, which he had purchased in 1886 as a wedding gift for Mina. Rev. Stephen J. Herben officiated at the funeral; Edison is buried behind the home. Edison's last breath is reportedly contained in a test tube at The Henry Ford museum near Detroit. Ford reportedly convinced Charles Edison to seal a test tube of air in the inventor's room shortly after his death, as a memento. A plaster death mask and casts of Edison's hands were also made. Mina died in 1947. Marriages and children On December 25, 1871, at the age of 24, Edison married 16-year-old Mary Stilwell (1855–1884), whom he had met two months earlier; she was an employee at one of his shops. They had three children: Marion Estelle Edison (1873–1965), nicknamed "Dot" Thomas Alva Edison Jr. (1876–1935), nicknamed "Dash" William Leslie Edison (1878–1937) Inventor, graduate of the Sheffield Scientific School at Yale, 1900. Mary Edison died at age 29 on August 9, 1884, of unknown causes: possibly from a brain tumor or a morphine overdose. Doctors frequently prescribed morphine to women in those years to treat a variety of causes, and researchers believe that her symptoms could have been from morphine poisoning. Edison generally preferred spending time in the laboratory to being with his family. On February 24, 1886, at the age of 39, Edison married the 20-year-old Mina Miller (1865–1947) in Akron, Ohio. She was the daughter of the inventor Lewis Miller, co-founder of the Chautauqua Institution, and a benefactor of Methodist charities. They also had three children together: Madeleine Edison (1888–1979), who married John Eyre Sloane. Charles Edison (1890–1969), Governor of New Jersey (1941–1944), who took over his father's company and experimental laboratories upon his father's death. Theodore Miller Edison (1898–1992), (MIT Physics 1923), credited with more than 80 patents. Mina outlived Thomas Edison, dying on August 24, 1947. Wanting to be an inventor, but not having much of an aptitude for it, Thomas Edison's son, Thomas Alva Edison Jr., became a problem for his father and his father's business. Starting in the 1890s, Thomas Jr. became involved in snake oil products and shady and fraudulent enterprises producing products being sold to the