Thomson Houston First Electric Butt Welding Machine, c. 1886, accessories: 2 pieces of 2" x 5/8" steel prepared for welding; 2 pieces of 2"x 5/8" steel welded, as from machine; 2 pieces of 2"x 5/8" steel showing perfect weld after being dressed; 2 pieces of 2"x 5/8" steel welded and twisted Thomson Houston First Electric Butt Welding Machine 1902