The column 7 and {TAIL ~ the entire apparatus} may be wrapped in a thermally controlled housing 11 as represented in {HEAD ~ herringbone patterned fill} in 
The column 7 and { TAIL ~ the entire apparatus } may be wrapped in a thermally controlled housing 11 as represented in { HEAD ~ herringbone patterned fill } in
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH