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