The proof given is that now usually repeated in text-books of hydrodynamics.
This subject is often explained in connection with hydrodynamics.
Thomson devoted great attention from time to time to the science of hydrodynamics.
But it is precisely the motion of these particles that the student of hydrodynamics desires to be able to trace.
Equations with several dependent variables occur in Elasticity, Electrodynamics, and hydrodynamics.
The scientific study of the motion of fluids, especially noncompressible liquids, under the influence of internal and external forces. Hydrodynamics is a branch of fluid mechanics and has many applications in engineering. Compare aerodynamics, hydrostatics.