11/^ BULLETIN 173, U. S. NATIONAL MUSEUM 



ERIE CITY DRUM-TYPE BOILER, 1928 

 U.S.N.M. no. 309411 ; gift of the Erie City Iron Works ; not illustrated. 



This is a model of a modern 500-horsepower boiler of the curved 

 tube or drum type, equipped with a unit coal pulverizer and burner. 

 The boiler has the Seymour water-cooled furnace walls and a vertical, 

 curved-tube, drum-type economizer. 



The brickwork of the boiler is represented cut away to show the 

 arrangement of all the heating elements, including the furnace wall 

 cooling tubes and the economizer. The headers of the water walls are 

 connected to the upper forward or steam drum, while water from the 

 economizer is fed to the upper back drum. The combustion chamber 

 extends over the entire height of the boiler with two coal-burner 

 nozzles directed downward from the top. 



"EVOLUTION OF THE STEAM BOILER" 



U.S.N.M. no. 309876; 14 drawings; gift of the Babcoclc & Wilcox Co.; not 

 illustrated. 



This is a series of 18-by-24-inch illuminated drawings showing the 

 evolution of stationary and marine water-tube boilers from Heron's 

 aeolipile of the first century, B. C, to the 1400-pounds-per-square-inch 

 boilers of 1928. The draAvings are by Edmund Mills. 



In the order in which they are displayed, the drawings illustrate 

 and describe the following boilers : 



(1) Heron of Alexandria, boiler and engine, c. 50 B. C. : .John Blakey water 

 tube boiler, 1766; James Rumsey, 1788; Joseph Eve first sectional water-tube 

 boiler, 1825. 



(2) Goldsworthy Gurney, 1826; Stephen Wilcox inclined water-tube boiler, 

 1856; George Twibill inclined-tube sectional boiler, 1865; Babcock & Wilcox 

 bolted-header inclined-tube boiler at Cape Fear Fibre Co., 1872. 



(3) Babcock and Wilcox sinuous-header boiler at Pearl Street Station of 

 Edison Illuminating Co., New York, 1881 ; model of Pearl Street Station, 1881- 

 1890. 



(4) Babcock and Wilcox, 1,400 pounds per square inch pressure, 1,510 rated 

 horsepower boiler, with underfeed stoker, superheater, water economizer, air 

 preheater, and reheater superheater, for Edison Electric Illuminating Co., Boston, 

 1927. 



(5) Manufacture of high-pressure (1,400 pound) forged-steel seamless drums 

 from ingot mold to completed forging, showing pouring, reheating, cropping, hot- 

 punching, expanding the ingot, elongation, furnace annealing, boring, turning, 

 closing the ends, and several completed forgings. 



(6) Allan Stirling 3-drum boiler, 1889; typical 5-pass, 4-drum boiler, 1898; 

 Stirling boiler, with superheater and natural draft stoker, 1914; Stirling boiler 

 installation with superheater and forced-blast chain-grate stoker, 1920. 



(7) High-pressure drum-type boiler, 2,853 rated horsepower, 1,390 pounds 

 steam working pressure, with plate air preheater, radiant heat superheater, 

 radiant heat reheater superheater, and water-cooled (30,000 cu. ft.) powdered 

 coal furnace, installed at the Lakeside Station of the Milwaukee Electric Rail- 

 way & Light Co., 1926. 



