Small multiple consists of a set of maps, one for maps, one for each time element for which data have been collected. As an example. Figure 22.5 portrays a small multiple of stream discharge for seven collection stations within a hypothetical drainage basin at 12-hour intervals over a four-day period (the data are distributed with Maptime). It is presumed that the streams flow from west, that circle size is proportional to stream discharge (in cubic feet per second), and that heavy rainfall occurs between 6 PM Monday and 3 AM Tuesday throughout the region. The small multiple reveals an initial increase in discharge for upstream stations, followed by a later increase for downstream stations; essentially, a pulse of water move through the system. The pulse of water seen in the small multiple is also detectable in an animation of the stream discharge data, but it is not easy to discern.