The machine legs or stands then go to the Drilling Room, where the screw-holes are drilled out, and thence to the Japanning Room, where a set of grimy men, in half undress costume, souse them into a vat of liquid japan, after which they are put into great brick ovens, and left for several days for the japan to thoroughly bake and harden. This gives them a handsome, black, glossy finish and prevents rust. The other cast iron parts are similarly treated, except the “arm” and “bed;” these, after being firmly secured together, are japanned and scoured down; then japanned again, and again scoured down. A third japanning and scouring is then given and they go to the Ornamenting Room, of which we shall see something shortly. The wheels, and other parts which work against other portions of the machine, go before japanning to the Milling Department, an immense shop 1,250 feet long, upon two floors, and 50 feet wide, where they are put upon a lathe and shaved off with steel knives to the exactness of a hair. Next above the Rumbling Room we come to the Forging Shop. Here numbers of great drop hammers are stamping out, at a single blow, the steel and wrought iron parts of the machines. These hammers weigh from three hundred to fifteen hundred pounds each. They are made with a “die” on their face, and the bed or anvil on which they drop has a corresponding die, so that a bar of hot iron held on the anvil is, by a single blow of the falling hammer, converted into a shuttle, a feed driver or a completely formed lever. Even the shuttle, which looks so much like a little boat, is made with a single blow of a huge drop hammer, which converts a square bar of iron in an instant of time into a perfectly formed shuttle. It is afterwards taken to another room, where another machine, with just one vigorous _push_, forces the shuttle through a sharp-edged aperture in a steel die, which trims off all unevenness and every bit of steel that may have projected beyond the edges of the die in the drop hammer. In another room the shuttle is drilled with holes for the thread; in another it is polished on an emery wheel, and in yet another is fitted with the little check spring, and then, after receiving the bobbin, it is ready for service in _your_ Singer machine. The Forging Shop is 423 feet long and 50 feet wide. [Illustration: STOCK ROOM. ]