About 1850, efficient ventilators of the centrifugal type were first introduced, and are now almost universally employed where the circulation of large volumes of air is necessary, as in collieries. [Please select]
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He dispatched an army of men to adjust electric fans, turn patent ventilators, and even to do so crude a thing as open a window. [Please select]
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The gas, the smoke, the shrieking ventilators, and the ceaseless sullen roar of the city are hardly to their liking. [Please select]
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She lacked glass, plate, crockery, cutlery, mattresses, cuddy carpets and chairs, all boats, and her copper ventilators. [Please select]
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Ventilators were quickly brought to their places, and later even the hatches were battened down. [Please select]
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Ventilators and loopholes, controlled by wires from the center, were cut in the ends and protected by sliding covers. [Please select]
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In a moment he was jamming the panel shut and springing the slides over the loopholes and the ventilators. [Please select]
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[Illustration: LARGE SMOKE-HOUSE OF ORDINARY CONSTRUCTION, WITH SHIELDED VENTILATORS PERMANENTLY OPEN. [Please select]
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You look for the ventilators, and see how many are open and how they work. [Please select]
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The nurse explains that a certain degree is ordered, and that, so far as possible, the ventilators are operated to insure that. [Please select]
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Above her she could hear the irregular footfalls of the bishop on the tilting deck, and the shrill humming of the wind in the ventilators. [Please select]
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