Referring to FIG 2, {HEAD ~ the linear motion} of {TAIL ~ a microscope slide} 2 and the limited rotary motion of an oscillating arm 19 carrying lens 18 are depicted 
of
Referring to FIG 2 , { HEAD ~ the linear motion } of { TAIL ~ a microscope slide } 2 and the limited rotary motion of an oscillating arm 19 carrying lens 18 are depicted
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH