¨#¨#¨#¨¨#¨                                          ¨#¨¨¨#¨##¨
##¨#¨#¨##¨                                          ##¨¨##¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨                   rails                  ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ ######################################## ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ ######################################## ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨ trains  are  so  constructed  that  they ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ have to follow a set path.  this path is ¨#¨#¨#¨##¨
##¨#¨#¨##¨ called a "railway", which  is  comprised ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ of two metal rails,  hence its nickname. ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ because  the low  friction  between  the ¨#¨#¨#¨##¨
##¨#¨#¨##¨ wheels of the  train and the rail metal, ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ there are  limits  for how acute a curve ¨#¨#¨#¨##¨
##¨#¨#¨##¨ can be, and even more  so  for  how much ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ the   ground  under  the  rails  can  be ¨#¨#¨#¨##¨
##¨#¨#¨##¨ sloped. thus a railway  is often not led ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ on top of hills, rather  through them in ¨#¨#¨#¨##¨
##¨#¨#¨##¨ tunnels   (if   they   are  large),   or ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨            artificial chasms.            ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ there will be trees  on the side of  the ¨#¨#¨#¨##¨
##¨#¨#¨##¨ rails, but not too close, or  they  will ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ be cut  down  by  the railway  janitors. ¨#¨#¨#¨##¨
##¨#¨#¨##¨ there  will  be plains,  and  bodies  of ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                  water.                  ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ trains go by  day  and  by  night. along ¨#¨#¨#¨##¨
##¨#¨#¨##¨      the way, there is information       ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ scattered, often  put  on top  of poles, ¨#¨#¨#¨##¨
##¨#¨#¨##¨ to  be interpreted by the train drivers. ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ different  parts  of  the  railway  have ¨#¨#¨#¨##¨
##¨#¨#¨##¨         different speed limits.          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨ sometimes, trains have to  stop and wait ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ for something to happen, far away.  this ¨#¨#¨#¨##¨
##¨#¨#¨##¨ is  signaled  by  red or  green  lights. ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨                 ########                 ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨ many  people follow the  rails  by foot. ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ often  this  proves to  be  the  shorter ¨#¨#¨#¨##¨
##¨#¨#¨##¨ path  between two  points. however  this ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨ is  frowned  upon,  and   very  impolite ¨#¨#¨#¨##¨
##¨#¨#¨##¨         toward the train drivers!        ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨
¨#¨#¨#¨¨#¨                                          ¨#¨#¨#¨##¨
##¨#¨#¨##¨                                          ##¨#¨#¨¨#¨