Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 825
heated air is introduced and the foul air extracted from the rooms,will be understood by referring to Figs. 3732, 3733, and 3734, which represent the arrangement forwarming and ventilating three of the large associate rooms in the main building, which are each 47 by44 feet. Tb«j flues FFF lead from… … The foul air is drawn off by means of the foul-air flues V V placed in the sides of the rooms, oppositeto the entrance for warm air; they open close to the floor, thus producing a downward ventilation.Through these it is conducted to the main foul-air flue K K, Figs. 3733 and 3734; from thence…
Mechanical engineering
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