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 86
nace passing as the arrow indicates, and the draught being sus-tained by descending showers, supplied by a pipe fed by asteam-engine, or in any other way that local circumstances may Fig. 19. … render more suitable. The valve on the left regulates the rapidityof the escape of the uncondensed gases that are subjected to theaction of the water in the descending shafts. The productscollected below may, in some cases, be so valuable as to repaythe cost of the apparatus. 62 SMOKE, 106. Figs.…
