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Updated: May 2, 2025
The blast-lamp roared upon a timber overhead, throwing down waves of light that flooded the rock face, but the twinkling brightness rather puzzled the eye. For all that, Festing struck the wedge squarely and drove it home with a few heavy blows. Then he fastened the cross-bolt and Charnock filled a ladle with the melted lead.
They worked by a blast-lamp until late at night and began again before daybreak in the morning. The weakened frame had been replaced, but others needed strengthening and the rockwork must be built up among the timbers. The stones required careful fitting, and it was impossible to dress them to rough shape. The frozen surface resisted the tool and they broke if much force was used.
He broke into a splashing run; and presently Carroll, whom he had forgotten, came up calling to him. When he reached the blast-lamp, which was raised on a tall tripod, Vane stood with his back to the pulsating gaze while he grasped the details of a somewhat impressive scene.
The blast-lamp flung its glare upon the engine and the rays of the powerful head-light drove horizontally into the dark, but the space beyond the broken end of the dam was kept in shadow by the block, and the glitter above dazzled his eyes. "Swing the derrick-boom and tell the engineer to come on a yard or two," he said.
Since he had been forced to use steel, he had no doubt taken the necessary precautions. It was dark when Charnock got back to the frame, but a blast-lamp threw out a dazzling glare and he climbed to a beam on which Festing sat. At the timber's inner end a fire burned on a shelf of rock and a man was stirring something in an iron pot.
It got dark soon in the hollow, but as the light faded the flame of a powerful blast-lamp sprang up and threw out a dazzling glare. The lamp belonged to the company, and Festing did not ask Charnock how he had got it. Bob had his own methods, and it was better to leave him alone. When the whistle blew, the latter turned to the borrowed men. "Go to our shack, boys, and get supper there.
"Go for Kerr, one of you," he said. "Then I want the stretcher and a hand-sledge. Bring a blast-lamp; ours is smashed." The men scattered, except for one who stayed with him, and kneeling in the snow he opened Festing's fur-coat and took off his cap. His head was cut and his arm broken, but Charnock did not think this altogether accounted for his unconsciousness.
A blast-lamp is likely to be more useful here than the fish-tail burner. =Drawing Out a Tube.= Most students learn this the first day of their laboratory work in chemistry, but few take pains to do it well.
When compressed air is available it can be used, but if possible it should be arranged so that the supply can be controlled by the foot, as both hands are usually needed to hold the work. For the same reason the supply of air is usually regulated by varying the rate of operation of the bellows, rather than by adjusting the valve of the blast-lamp.
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