410 



POPULAR SCIENCE MONTHLY. 



From tlie trolley wire, tliroiigli the trolley pole t, to the fixture 

 on top of the ear which holds the latter. From this fixture, as 

 shown by the heavy full line, the current passes to a, which is a 

 switch located under the car hood overhanging the platform. 

 From this switch the current passes to a similar one, marked h, 



-R- 



Fig. 18. 



Fig. 19. 



Figs. 18, 19.— Outline Elevation and Plan of Electric Railway Car, showing 

 OK Motors, Controlling Switches, and Connecting Wires. 



Location 



located in a like position at the other end of the car. These two 

 switches are called emergency switches; they are provided simply 

 as a safety device, and are used only when the main switches get 

 out of order and the motorman can not turn the current off in the 

 regular way. From the last hood switch h the current passes to 



