He had hesitated a long time before opening the door. For a weird existence went on behind that door. There was howling. There was panting. There was whistling. The whole building groaned. An incessant trembling ran through the walls and the floor. And amidst it all there was not one human sound. Only the things and the empty air roared. Men in the room on the other side of this door had powerless sealed lips. But for these men’s sakes Freder had come. He pushed the door open and then fell back, suffocated. Boiling air smote him, groping at his eyes that he saw nothing. Gradually he regained his sight. The room was dimly lighted and the ceiling, which looked as though it could carry the weight of the entire earth, seemed perpetually to be falling down. A faint howling made breathing almost unbearable. It was as though the breath drank in the howling too. Air, rammed down to the depths, coming already used from the lungs of the great Metropolis, gushed out of the mouths of pipes. Hurled across the room, it was greedily sucked back by the mouths of pipes on the other side. And its howling light spread a coldness about it which fell into fierce conflict with the sweat-heat of the room. In the middle of the room crouched the Pater-noster machine. It was like Ganesha, the god with the elephant’s head. It shone with oil. It had gleaming limbs. Under the crouching body and the head which was sunken on the chest, crooked legs rested, gnome-like, upon the platform. The trunk and legs were motionless. But the short arms pushed and pushed alternately forwards, backwards, forwards. A little pointed light sparkled upon the play of the delicate joints. The floor, which was stone, and seamless, trembled under the pushing of the little machine, which was smaller than a five-year-old child. Heat spat from the walls in which the furnaces were roaring. The odour of oil, which whistled with heat, hung in thick layers in the room. Even the wild chase of the wandering masses of air did not tear out the suffocating fumes of oil. Even the water which was sprayed through the room fought a hopeless battle against the fury of the heat-spitting walls, evaporating, already saturated with oil-fumes, before it could protect the skins of the men in this hell from being roasted. Men glided by like swimming shadows. Their movements, the soundlessness of their inaudible slipping past, had something of the black ghostliness of deep-sea divers. Their eyes stood open as though they never closed them. Near the little machine in the centre of the room stood a man, wearing the uniform of all the workmen of Metropolis: from throat to ankle, the dark blue linen, bare feet in the hard shoes, hair tightly pressed down by the black cap. The hunted stream of wandering air washed around his form, making the folds of the canvas flutter. The man held his hand on the lever and his gaze was fixed on the clock, the hands of which vibrated like magnetic needles.