$p$ kPa

$h_1$ (cm)

$h_2$ (cm)

$\overline{h}$ (cm)

$t_{90}$ (s)

$C_{\text{v}}$ (10⁻³ cm²/s)

25

2

1.9688

0.992

60

13.85

50

1.9688

1.9562

0.981

60

13.60

100

1.9562

1.933

0.972

60

13.30

200

1.933

1.8953

0.957

60

13.02

400

1.8953

1.8481

0.936

60

12.49