Image Description -  0650

A schematic diagram is captioned “Figure1. Series-Parallel Water
Valve Arrangement.”  Four water valves are shown at the corners of a
square.  The two valves on the left are designated “ARM” and connected
to a “water supply.”  The two valves on the right are designated 
“ACTIVATE” and connected to a “FIREX/DELUGE SPRAY.”  Lines connecting
the four valves form a shape like the letter “I”.  The connecting
lines indicate the six possible pathways between the “WATER SUPPLY”
and the “FIREX/DELUGE SPRAY” through the four valves.