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