In December 25th 1871, Edison married his first wife, Mary Stilwell and they both had three children after which he moved his family from Newark to Menlo Park, New Jersey, in 1876. There he built his most famous laboratory and within a year, it became the largest scientific testing laboratory in the world. He invented in 1877, the
In December 25th 1871, Edison married his first wife, Mary Stilwell and they both had three children after which he moved his family from Newark to Menlo Park, New Jersey, in 1876. There he built his most famous laboratory and within a year, it became the largest scientific testing laboratory in the world. He invented in 1877, the