This eliminates false readings due to downwardly descending soap film solution on {HEAD ~ the inside} or the outside of {TAIL ~ tube} 22 
of
This eliminates false readings due to downwardly descending soap film solution on { HEAD ~ the inside } or the outside of { TAIL ~ tube } 22
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH