Figure 3.1. An Ideal Bill Rack.
in the rack. Careful switching of bills is just as important as
switching of the cars. When bills are correctly switched, one may
see the exact standing of a track merely by leafing through them.
The separation of bills by tracks makes it a simple matter to
estimate or compute the tonnage of any track when planning an
b. The standing of the waybills in a particular slot in the rack
should agree exactly with the entry in the journal. However, it is
extremely dangerous to look at track 9 slot, for example, and,
because it contains no waybills, assume that the track is clear. The
journalnever the bill rackis the authority for determining the
clear tracks on which trains may be ordered into the yard. A
particular slot in the bill rack may be empty but a mistake may have
been made in switching the bills, and cars may actually occupy the