A mechanism is provided for adjusting the ratio of the volume to {HEAD ~ the compliance} of the reference cell, so that this ratio may be made exactly equal to {TAIL ~ the corresponding ratio} for the measuring cell 
of
A mechanism is provided for adjusting the ratio of the volume to { HEAD ~ the compliance } of the reference cell , so that this ratio may be made exactly equal to { TAIL ~ the corresponding ratio } for the measuring cell
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH