Mason wanted to improve the symmetry of the American locomotive. A first engine was turned out in 1853. In 1857 his firm failed but he managed to reopen the plant soon afterwards. The textile business recovered rapidly but the locomotive business was less prosperous. By 1860, he had produced a total of only 100 engines. The figure was doubled by 1865 due to the wartime demand and the pace continued for the next several years. Also during the American Civil War, 600 Springfield rifles were turned out weekly.