A nursery school teacher was delivering a station
                 wagon full of kids home one day when a fire truck
                 zoomed past.  Sitting in the front seat of the fire
                 truck was a Dalmatian dog.  The children began
                 discussing the dog's duties. 

                 "They use him to keep crowds back," said one
                 youngster.

                 "No," said another, "he's just for good luck."

                  A third child brought the argument to a close.  "They
                  use the dogs," she said firmly, "to find the fire hydrant."