Abstract
The mixing length theory has been extended to cover the non-neutral conditions, and basing on it the expressions for the velocity profile applicable to conditions of any degree of stability have been derived. It was shown that the theoretical profiles agree fairly well with the observed profiles due to Rider. At the same time comparison with Rider's observations has revealed some defects of the theory, which seem to be due to neglection of the effects of radiative transfer in the present theory.
