Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 655
638 ARCHITECTURAL CONSTRUCTION. … Fig. 1531. means of heating and ventilation. As a heater merely, the open grate in verycold weather is not satisfactory; its influence is only felt in its immediatevicinity, and but from 10 to 15 per cent, of the heat of the fuel is renderedavailable. Fig. 1531 represents an old form of open fire…
Mechanical drawing
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