Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 663
n of water by thecombustion of pounds of coal being thestandard of efficiency. Under the head of chimneys it isstated that two square inches of flue issufficient for the combustion of eachpound of coal per hour. This has beenfound in excess for a 5-foot diam. chimney,where provision has been made… … Fig. 1540. ARCHITECTURAL CONSTRUCTION. 647
Mechanical drawing
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