Abstract
Reflecting on the twenty years' history of the theory of general advection it is pointed out that the subject must be dealt with as a well-defined dynamical problem, in order that that a definite unobjectionable theory might be developed. In Section 2, after making clear the process of advection and defining accurately the quantities concerned, the fundamental formulas of advection are derived, which are more comprehensive than those ever published and the meanings of several previous theories are explained. Section 3 deals with the contribution of thermal effect to the advection and Section 4 the effect of the discontinuous surface. In Section 5 new forms of advection formulas are presented, which are useful for practical purposes.
