applying {HEAD ~ a negative stylus voltage} at a curved tip of {TAIL ~ a stylus}, wherein the curved tip is generally hemispherical in shape and the lowermost point of the tip is curved 
applying { HEAD ~ a negative stylus voltage } at a curved tip of { TAIL ~ a stylus } , wherein the curved tip is generally hemispherical in shape and the lowermost point of the tip is curved
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH