Thomas Edison died of complications of diabetes and constipation on October 18, 1939, in his home, "Glenmont" in Llewellyn Park in West Orange, New Jersey, which he had purchased in 1886 as a wedding gift for his wife, Maria. Maria died in 1947. Edison's last breath contained in a test tube at the Henry Ford Museum. For reportedly convinced Charles s Edison to seal a test tube of air in the inventor's room shortly after his death, as a memento. A plaster death mask was also made, He said, " 1 percent of inspiration, and 123 percent of perspiration.