ILLUSTRATIONS V 



Facing page 



18. Corliss beam engines 78 



(1) Corliss compound beam pumping engine, 1870. 



(2) Corliss Centennial steam engine, 1876. 



19. Steam-engine governors 79 



(1) Porter weighted engine governor, 1858. 



(2) Thompson and Hunt shaft governor, 1878. 



20. Engine indicators 94 



(1) McNaught, c. 1835-1842. 



(2) Richards, c. 1867. 



(3) Crosby, 1879. 



(4) Indicator with continuous card attachment, 1930. 



21. Engine accessories 95 



(1) Multiple hydrostatic lubricator. 



(2) Hewitt piston-rod packing. 



22. Early steam boilers 110 



(1) Wooden steam boiler, 1801-1815. 



(2) Stevens water-tube boiler, 1803-1825. 



23. National water-tube boiler, 1885 111 



24. Sectional boilers 116 



(1) Babcock and Wilcox steam generator, 1867. 



(2) Sinuous boiler headers, 1867-1926. 



25. Double-deck inclined-tube boiler, 1929 117 



26. Boiler accessories 124 



(1) Stevens safety valve, 1825. 



(2) Mechanical oil burner, 1929. 



27. Feed-water injectors 125 



(1) Giffard injector, 1860. 



(2) Exhaust feed- water heater injector, 1925. 



28. Steam pumps 134 



(1) Worthington direct-acting steam pump, 1855. 



(2) Cameron pump valves, 1874. 



29. Steam pumps 135 



(1) Knowles steam pum.p, 1879. 



(2) Frost steam-pump valve, 1890. 



30. Internal-combustion engines 148 



(1) Perry gas or vapor engine, 1844. 



(2) Drake gas engine, 1855. 



31. Internal-combustion engines 149 



(1) Otto and Langen gas engine, 1867. 



(2) Bray ton oil engine, 1874. 



32. Internal-combustion engines 154 



(1) Otto 4-stroke cycle engine, 1877. 



(2) Otto gas engine, 1882. 



33. Internal-combustion engines 155 



(1) Hornsby-Akroyd oil engine, 1893-1895. 



(2) Manly radial engine, 1901. 



34. Carburetors 174 



(1) Duryea carburetor, 1893. 



(2) Dyke float-feed carburetor, 1900. 



(3) Carburetor of the Manly engine, 1901. 



