Still referring to FIG 1, block 15 depicts {TAIL ~ the first step} in the practice of {HEAD ~ this invention} 
Still referring to FIG 1 , block 15 depicts { TAIL ~ the first step } in the practice of { HEAD ~ this invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD