The first occurrence of {HEAD ~ a measured weight decrease} greater than {TAIL ~ the reference rate} signifies that the boiling point of the liquid has been reached 
greater than
The first occurrence of { HEAD ~ a measured weight decrease } greater than { TAIL ~ the reference rate } signifies that the boiling point of the liquid has been reached
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH