Word: dampers
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Dates: during 1877-1877
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...Boston a few years ago (and is still, for all that the writer knows to the contrary), consisting of a board which fits into the window-frame, and is furnished with a large pipe covered with a wire netting through which the draught of air is regulated by a damper. If a supply of these were put into University, the number of students kept in their rooms by colds would be very much diminished, and the powers that be would be relieved of the trouble of reading numerous physicians' certificates...