With door 54 and cover 14 in their closed position, as shown in FIG 3., {HEAD ~ a substantially air tight chamber} 56 is formed in {TAIL ~ the interior} of kiln 10 
With door 54 and cover 14 in their closed position , as shown in FIG 3 . , { HEAD ~ a substantially air tight chamber } 56 is formed in { TAIL ~ the interior } of kiln 10
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH