Plate 2B: http://www.google.co.in/search?hl=en&q=tactile+sensor&bav=on.2,or.r_gc.r_pw.r_qf.&biw=13 41&bih=604&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=wUE4Udu1MMbIrQeFjYHoDQ# um=1&hl=en&biw=1341&bih=604&tbm=isch&q=tactile+feeling&spell=1&sa=X&ei=20E4Uf7HKIy3rAe8Y CAAg&ved=0CEoQvwUoAA&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.43287494,d.bmk&fp=1c82f30967b1c5 cf&imgrc=muRNW_By9bHTfM%3A%3BXQqu3ND9JXMHWM%3Bhttp%253A%252F%252Fwww.a4a.info %252Fviza%252Fimag%252Fl%252Fv-018-03b.jpg%3Bhttp%253A%252F%252Fwww.a4a.info%252Fviz a%252Fhtml%252Fv-018-03.html%3B600%3B240 ; March 7, 2013