  In Phys. Rev. {\bf E 70}, 047102 (2004), J.R. Torgerson and S.K. Lamoreaux
investigated for the first time the real-frequency spectrum of finite
temperature correction to the Casimir force, for metallic plates of finite
conductivity. The very interesting result of this study is that the correction
from the TE mode is dominated by low frequencies, for which the dielectric
description of the metal is invalid. However, their analysis of the problem,
based on more appropriate low-frequency metallic boundary conditions, uses an
incorrect form of boundary conditions for TE modes. We repeat their analysis,
using the correct boundary conditions. Our computations confirm their most
important result: contrary to the result of the dielectric model, the thermal
TE mode correction leads to an increase in the TE mode force of attraction
between the plates. The magnitude of the correction has a value about twenty
times larger than that quoted by them.
