"Look! Look!" cried the Pole, dancing up and down and pointing excitedly up above their heads into the thin cloud of smoke that hovered over them. Steve looked. His heart sank within him as he did so and his head began to whirl dizzily. CHAPTER VI BOB'S DIZZY FLIGHT "Bob, him there! Bob, him there!" cried Ignatz. "See, see!" On a girder, a huge steel truss some fifteen feet above their heads, and a little to one side of the centre, lay a limp figure, apparently ready to topple off at the slightest jar. The face of the figure up there was not visible, for it was flattened on the girder, while the arms and limbs hung over limp and motionless. "It's Bob!" gasped the Iron Boy. "Help me, Ignatz! We must get him down." Young Brodsky did not wait to consider the matter. He darted away, followed by Steve. To reach the figure on the girder the lads were obliged to climb the upright of a big automatic crane that was used for conveying heavy pieces of iron from one end of the building to the other. Ordinarily the boys would have been stopped, but in the excitement no one paid any heed to them as they shinned up the iron column, Steve in the lead, Brodsky so close behind him that now and then Rush's heels grazed the Pole's face. Steve crept along the girder, using care not to cause it to vibrate any, lest he might be the means of shaking his companion down. At last he reached the spot where Jarvis lay. Steve uttered a shout to attract the attention of those below. As they glanced up they comprehended at once. Jarvis had been blown to the girder by the pit explosion. From appearances the spectators believed him to be dead. Steve did not know whether such were the case or not. He realized the necessity for haste if it were not. "Throw me a rope," shouted the lad. "There ain't any ropes here. Throw him over," called a voice jeeringly. The boys on the girder recognized it as belonging to Kalinski. "Somebody get a rope, I tell you!" thundered Rush. One was brought, coiled and tossed up. The first time it went wide of the mark and Steve, holding to Bob's unconscious form, fuming with impatience, nearly lost his balance in trying to catch the rope. The next time he was more successful. "Grab hold of the end, two or three of you down there," commanded the lad, letting an end of the rope drop to the ground. In the meantime he had made the other end fast around the waist of Bob Jarvis. "Are you all ready down there?" "Yes; let him come." After a keen glance below, to make sure that the men would not let the boy drop, Steve gently pushed Bob over the edge of the beam. Jarvis's body spun around like a top several times as it was being lowered. Rush breathed a sigh of relief when he saw it safely deposited. "Hold fast to the end of the rope. We're coming down," Rush shouted. Swinging himself over, he slid down, followed by Ignatz. The surgeon was already at work over Bob. "Is--is he----"