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 124
Fig. 50. … ^^«s^s.»^ >v. >^. v^s;^ nace and ventilating arrangements connected with a chimney inthe centre of my Class-room, at Edinburgh; part of them onlycan be worked at once, all connexion with the others being thencut off by means of valves. The arrows indicate the pro-gress of the air from the…
