subjecting {HEAD ~ the array} of noncommunicating spaced chambers with {TAIL ~ said packets} containing a thermoresponsive mixture enclosed therein to a predetermined temperature environment; and 
subjecting { HEAD ~ the array } of noncommunicating spaced chambers with { TAIL ~ said packets } containing a thermoresponsive mixture enclosed therein to a predetermined temperature environment ; and
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH