  We comment on physical inconsistences of the Cl\'ement-Gal'tsov approach to
Smarr's mass formula in the presence of magnetic charge. We also point out that
the results of Cl\'ement and Gal'tsov involving the NUT parameter are
essentially based on the known study (dating back to 2006) of the
Demia\'nski-Newman solutions which was not cited by them.
