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 150
of air. 256. It is equally important to supply pure air from an eli-gible source, free from the contaminating influence of drains, ofthe surface of the street, of the smoke line in the vicinity, andfrom any local source of impurity. 257. Fig. 94 gives a general illustration of mixed ventilation,the… … at the other. In this figure the wind is supposed to be from thewest. 258. Fig. 95.—The same building, shewing the same gene-Fig. 96. Fig. 97.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-439-256.webp)
