for given
are not equally likely, the effect of collisions is to make
diminish." [In essence BURBURY'S condition
says no more than that Theory of Probabilities is applicable for finding number of collisions.] Furthermore, "any actual material system receives disturbances from without, the effect of which coming at haphazard without regard to state of system for the time being is, pro tanto, to renew or maintain the independence of the molecular motions, that very distribution of co-ordinates (of collision) which is required to make
diminish. So there is a general tendency for