Abstract
In the previous paper(1) the author discussed the lability of mixed air mass, assuming the dry adiabatic motion. The result shows that the lability of mixed air depends on its volume as well as its lapse-rat_??_.
In the present paper this problem is generalized to the case of moist adiabatic motion. In this case the labile energy becomes more pronounced, as may de expected. It is also presented one observational fact to prove the existence of convective cloud belonging to such mechanism.
