An experimental study of the vertical distribution of local temperature in terms of their first three moments is reported. Three sets of experiments were performed in air (Pr=0.71) over the range $4.6\times×10^56$ it decreased from a positive maximum to zero. This is a positive evidence that the turbulent thermal convection has well-known three-layers. An approximate measurement of the heat flux yielded the dependence $Nu\approx0.0877Ra^{0.3189}$. Although the coefficient and the power index are a little different from previous correlations, individual data point agrees well with other experiments.
