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