The heat tongue is metal and in {TAIL ~ a preferred form} may be formed of {HEAD ~ brass} 
The heat tongue is metal and in { TAIL ~ a preferred form } may be formed of { HEAD ~ brass }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD