Recently Mishonov (Phys. Rev. B {\bf 50}, 4009 (1994)) suggested to measure the Cooper-pair effective mass using current-induced contact potential difference in superconductors. In this Comment it is shown that actual experiments can be substantially simplified.
@article{arxiv.cond-mat/9605036,
title = {Bernoulli effect in superconductors and Cooper-pair mass spectroscopy},
author = {M. V. Simkin},
journal= {arXiv preprint arXiv:cond-mat/9605036},
year = {2007}
}