The apparatus further includes a source of octenol provided in the housing, and {HEAD ~ a device} for introducing and mixing {TAIL ~ the octenol} with the carbon dioxide within the housing 
for introducing
The apparatus further includes a source of octenol provided in the housing , and { HEAD ~ a device } for introducing and mixing { TAIL ~ the octenol } with the carbon dioxide within the housing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH