  Lee, Rice and Anderson, in their monumental paper, have proved the existence
of a collective mode describing the coupled motion of electron density and
phonons in one-dimensional incommensurate charge density wave (CDW) in the
Peierls state. This mode, which represents the coherent sliding motion of
electrons and lattice distortions and affects low energy transport properties,
is described by the phase of the complex order parameter of the Peierls
condensate, leading to Fr\"ohlich superconductivity in pure systems. Once
spatial disorder is present, however, phason is pinned and system is
transformed into an insulating ground state: a dramatic change. Since phason
can be considered as an ultimate of phonon drag effect, it is of interest to
see its effects on thermoelectricity, which has been studied in the present
paper based linear response theory of Kubo and Luttinger. The result indicates
that a large absolute value of Seebeck coefficient proportional to the square
root of resistivity is expected at low temperatures k_B T/\Delta <<1 (\Delta:
Peierls gap) with opposite sign to the electronic contributions in the absence
of Peierls gap.
