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