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