Procedures:
Grain length measured with calipers.1
2.Nitrogen cylinder connected to porosimeter; nitrogen passed through coil to reach it.
3.Device had three valves, each serving a purpose; first valve maintained constant coil pressure (P1).9.Last valve opened to release nitrogen from porosimeter; nitrogen cylinder closed to prevent accidents.7.Two spacers inserted into cell; pressure read (coil pressure + cell pressure + spacer volume).