### COMMENTS

At the end of the second paragraph of the Introduction, I write:
*
Flow through permeable tubes where the
wall leakage is computed as part of the solution according to
a membrane law has been considered only in terms
of simplified one- and two-dimensional models
that ignore the radial pressure gradient.
*

In fact, Marshall and Trowbridge (1974)
derive a remarkable exact solution of the Stokes equation
for a permeable tube of infinite length and compare
their solution with the approximate solution I rederive
in my paper with good agreement.
The pressure is assumed to be constant outside the tube.

I inadvertently missed the opportunity to compare my boundary-element
solution for a finite test section
with the Marshall and Trowbridge (1974)
solution for an infinite tube.