The second plate has {HEAD ~ an outwardly extending indicating plate} with {TAIL ~ a pair} of spaced pins, and an indicating strip for measuring the height of liquid collected in the compartment 
with
The second plate has { HEAD ~ an outwardly extending indicating plate } with { TAIL ~ a pair } of spaced pins , and an indicating strip for measuring the height of liquid collected in the compartment
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH