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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 132

An illustration from Illustrations of the theory and practice of ventilation : with remarks on warming, exclusive lighting, and the communication of sound, 1844, leaf 132
umber of revolutionsbe considerable, the air, as may be indicatedby the movement induced in smoke producednear it, will be seen to move in the direc-tion indicated by the arrows. 219. Instead of plain blades, others of acurved form may be seen in some fanners(Fig. 64), while the form of the curve… … 108 VENTILATION BY FANNER. 220. If it be required to lead air into the centre of the fan-ner for any special purpose, the external casing should be madeair-tight, so that no air can pass to the centre except by thecourse indicated by the arrows, and being discharged subse-quently at the opposite…

Ventilation · Heating · Lighting · Architectural acoustics

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