BUILDERS OI' 



Morse, Williams & Co., 



PASSENGER 



AND 



FREIGHT 



EUVJITORS 



ELECTRIC ELEVATOR. 

 Write us for Circulars and Prices. 



Main Office and \A/orks, 1105 Frankford Avenue, 



PHILADELPHIA. 



New York Offich. 



108 Liberty Street. 



Boston Office. 



19 Pearl Street. 



New Haven " 



. 82 Church Street. 



Baltimore " 



Builders' Exchange 



Pittsburg " . 



413 Fourth Avenue. 



SCRANTON " 



425 Spruce Street. 



Figure ig. — The electric elevator in its earliest commercial form (1891), with 

 the motor connected directly to the load. By this time, incandescent lighting 

 circuits in large cities were sufficiently extensive to make such installations 

 practical. However, capacity and lift were severely limited by weaknesses of 

 the control system and the necessity of using a drum. (From Electrical World, 

 Jan. 2, 1897, vol. 20, p. xcvii.) 



BULLETIN 228: CONTRIBUTIONS FROM THE MUSEUM OF HISTORY AND TECHNOLOGY 



