Illustrations of the theory and practice of ventilation : with remarks on warming, exclusive lighting, and the communication of sound (1844)
Reid, D. B. (David Boswell), 1805-1863 · London : Longman, Brown, Green, & Longmans · leaf 420
It will be obvious thatpaddles move the air as well as the water upon which they strike,and hence their power. The paddle, accordingly, when not in-terrupted in its action by a rough sea, or by the force of thewind, draws in air at the centre, and discharges air at the cir- VENTILATION OF RIVER… … the air supplied to the cabins, in the manner represented byFig. 294, the supply being taken from the circumference of thepaddle on one side, and the discharge effected through the centreof the other. 823. To afford greater security against the introduction ofwater, the air might be conveyed to the…
