{HEAD ~ A third aspect} of {TAIL ~ the present invention} is a double tapered scanning tunneling microscope tip 
of
{ HEAD ~ A third aspect } of { TAIL ~ the present invention } is a double tapered scanning tunneling microscope tip
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH