  We synthesized the five batches of the samples of the novel P3 type
superconductor, Na$_{x}$(H$_{3}$O)$_{y'}$CoO$_{2}\cdot y''$H$_{2}$O, by the
soft chemical process starting from $\alpha$-NaCoO$_{2}$. The chemical and
structural properties varied rather widely from batch to batch, with a result
that $T_{c}$ varied from 4.6 K to 3.2 K. The magnetic susceptibility above
$T_{c}$ shows upturn at low temperature as in the case of the P2 phase. The
$T_{c}$ seems to be well correlated to the lattice parameters.
