Appleton's cyclopaedia of drawing : designed as a text-book for the mechanic, architect, engineer, and surveyor : comprising geometrical projection, mechanical, architectural, and topographical drawing, perspective and isometry (1869)
Worthen, W. E. (William Ezra), 1819-1897 · New York : D. Appleton and Company · leaf 725
468 ENGINEERING DRAWING. long; four direct flues, 18" diameter, 14' 4" long; 1 return-flue, 12" diameter; 2 9" and 13 8" — all 12' 3" long ; grate, 23} sq. ft. The products of combustion pass through the 18"-flues to the back-connections, thence, dropping down, pass through the smaller … return-flues to the front-connection, thence back beneath the boiler to the chimney-flue. Cumberland coal burned per square foot of grate, 5.683 lbs. ; evaporation, 10.96 lbs. of water per pound of coal. “ Two tubular boilers, at the Nashua Manufacturing Company’s mills, Nashua, N. II., each 5'…
