  Precise calorimetric measurements have been carried out in the 7 - 300 K
temperature range on two ceramic samples of thulium 123 cuprates TmBa2Cu3O6.92
and TmBa2Cu3O6.70. The temperature dependence of the heat capacity was analyzed
in the region where the pseudogap state (PGS) takes place. The lattice
contribution was subtracted from the experimental data. The PGS component has
been obtained by comparing electronic heat capacities of two investigated
samples because the PGS contribution for the 6.92 sample is negligible. The
anomalous behavior of the electronic heat capacity near the temperature
boundary of PGS was found. It is supposed that this anomaly is due to
peculiarities in N(E) function where N is the density of electronic states and
E is the energy of carriers of charge.
