V 



Figure 6i. — Taylor's motor. {USNM iSiggs; Smithsonian photo ^yo^S.) 



Figure 62. — ^Joule's rotating motor. From 

 Sturgeon's Annals of Electricity, 1839, vol. 3, 

 pi. 13, fig. I. 



including the one shown in figure 62. He devised 

 another kind of motor (fig. 63) in 1842. In the same 

 year, P. Elias, of Haarlem, invented a motor with a 

 ring-type armature '°- (fig. 64). 



There were other inventors of electric motors in the 

 the United States. G. Q. Colton,'"' a traveling den- 

 tist fresh out of medical college, while demonstrating 

 some wonders of science like laughing gas and the 

 Morse telegraph, made an electric motor that he 

 added to his show. In 1847 Colton placed a recipro- 

 cating motor, 14 inches long by 5 inches wide, on a 

 track, and sent power from four Grove cells through 

 the track. This invention (fig. 65) was widely exhib- 



i»2 La Lumiere Hectrique, 1882, vol. 7, pp. 13-14. 



"^ Scientific American, September 25, 1847, vol. 3, p. 4. T. C. 

 Martin, "The Electric Railway Work of Dr. Colton in 1847— 

 The First Use of Track as Circuit," Electrical Engineer, 18'93, 

 vol. 16, pp. 49-51. 



266 



BULLETIN 228 : CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY 



