Blister volume (Vb): 62.37cm3
Distance from center of blister to lowest
reticle (Lo): 9.10cm
Length of staff: 13.50cm
Settling height calibrating formula of special
graduated cylinder:
L=a-bR 
a=21.50,  b=0.273,  
L (correct value of settling height): cm,  
R: reading value of hydrometer.