The Mechanic Arts, Հատոր 1

began bridge building built called carried cars cent completed connected construction cost distance dollars earth effect eight electric engineer erected experiments fact falls feet five followed force four furnace give glass half hand head hundred hundred feet idea important increase interest invention iron labor lake length less light look machine manufacture material means mechanical metal method miles million miners mining minutes mountain needed operation passed piles plans plate possible pounds practical produced railroad reached received result river road rock side skilled span station steel success supply telegraph tests thing thousand tion towers track train tunnel turn twenty United waves wire York