From accurate de Haas-van Alphen measurements one can deduce an unambiguous form factor for mercury. The calculated value of the specific resistivity of liquid mercury, based on this form factor, overestimates the experimental value. A correction factor (m*)⁴ is proposed which brings the calculated value of the specific resistivity into excellent agreement with the experimental one. The calculated volume derivative of the specific resistivity at the melting point agrees reasonably with the experimental value.