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Updated: September 10, 2025
Now it is desirable that the first valve to open under such circumstances should be the atmospheric valve D. This being so, the condenser would remain full of steam at atmospheric pressure until the attendant had had time to close the main hand-or motor-operated exhaust valve H, which he would naturally do before attempting to regain the circulation of the condensing water.
To right and left he hears the quiet continued crop, crop, crop, sound of animals grazing. The sweat runs down his face in streams, and blinds his eyes, but only occasionally and with the utmost caution can he raise his hand-or, better, lower his head-to clear his vision. When at last he has withdrawn from the danger zone, he wipes his face, takes a drink from the canteen, and tries again.
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