A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 235
V r^ 38 HEATING AND VENTILATION 17 rent, for ventilating purposes, by changing the vane v so that itwill hold the funnel towards the wind, instead of away from it. 61. The cowl shown in Fig. 21 is provided with a blow-ing cone a, which causes the cowl to operate as an ejector.The cone gathers the… … Fig. 21. current of high velocity; and, as this current emerges intothe mouth of the elbow or tube b, it communicates its velocityto the gases at the top of the chimney, forcing them aheadwith it, and creating a partial vacuum around the cone. Thegases from below then rush upwards with an…
Architecture · Building
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