WIRE-TRAMWAYS. 



351 



truck B on reaching (/) ascends (/ d) and passes from (d) to 

 (c) whilst the laden truck passes under it, and then rejoins the 



wire by pressing down (c e). The ladm truck A on reaching 

 (/) lifts up (///) and passes on its way. 



The iir.st single wire-tramway was constructed in Schlieren- 



Fig. 229. Truck. 



thai near Alpnach, in Canton Unterwalden, in Switzerland, it 

 has a length of 2,100 meters (1 mile 3 furlongs) and is sup- 

 ported at numerous points, with a gradient of 35 %. It differs 

 from the tramway just described by the fact that the wire is 



