The amount of matter in {HEAD ~ a certain state} of phase can however be so small in a borderline case the the cooling system of the device operates in practice with matter in {TAIL ~ one phase} only, e.g. liquid phase 
The amount of matter in { HEAD ~ a certain state } of phase can however be so small in a borderline case the the cooling system of the device operates in practice with matter in { TAIL ~ one phase } only , e.g. liquid phase
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH