CATAI.OGUE OF THE MECHANICAL ENGINEERING COLLECTION. 71 



The Steam and water chambers are annular spaces of about 1 

 square inch cross section and 10* inches in diameter, containing each 

 about 33 cubic inches. 



The cap of the steam chamber is secured by ten large and hve 

 small bolts, the diameters of which are eleven- sixteenths and five- 

 eighths of an inch, respectively. The steam outlet at the top is a 

 Dii)e 1 inch in diameter, the water inlet being a smiilar aperture at 

 ll,e bottom. Cat. No. 180,029 IT.S.N.M. 



FIG. 31.— HORSEPOWER LOCOMOTIVE, " THE FLYING DUTCHMAN," 1830. 



Model of " The Flying Dutchman," Horsepower Treadmill Car. Made in 



the Museum. 



In 1829 the South Carolina Eailroad Company offered a premium 

 of $500 for the best locomotive operated by horsepower. This pre- 

 mium was awarded to Mr. C. E. Detmold, who invented one which 

 was worked on an endless-chain platform or treadmill. 



When this horsepower locomotive was completed and tested upon 

 the road in 1830 it carried 12 passengers at the rate of 12 miles an 

 hour. It was propelled by one horse walking on the treadmill, which 

 was connected by gearing to the carwheel axles. ,, ,. ^r ^i 



Cat. No. 181,086 U.S.N.M. 



