said introducing and mixture forming means comprising a wax medium containing octenol, said medium having {HEAD ~ a porous exterior} for allowing {TAIL ~ gaseous octenol} to escape and mix with discharged carbon dioxide in the housing 
for allowing
said introducing and mixture forming means comprising a wax medium containing octenol , said medium having { HEAD ~ a porous exterior } for allowing { TAIL ~ gaseous octenol } to escape and mix with discharged carbon dioxide in the housing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH