## Pressure

`GSL_CONST_MKS_BAR`
  The pressure of 1 bar.
`GSL_CONST_MKS_STD_ATMOSPHERE`
  The pressure of 1 standard atmosphere.
`GSL_CONST_MKS_TORR`
  The pressure of 1 torr.
`GSL_CONST_MKS_METER_OF_MERCURY`
  The pressure of 1 meter of mercury.
`GSL_CONST_MKS_INCH_OF_MERCURY`
  The pressure of 1 inch of mercury.
`GSL_CONST_MKS_INCH_OF_WATER`
  The pressure of 1 inch of water.
`GSL_CONST_MKS_PSI`
  The pressure of 1 pound per square inch.