1. Biot ( 1956 ) established a fundamental theory of acoustic wave propagation through a fluid saturated porous elastic medium.

2. The article demonstrates Ampere's circulation theorem by Biot - Savart's law and vector analysis.

3. Biot - Savart Law: the magnetostatic field produced by a steady current.

4. The expressions in simultaneous form of the generalized Coulomb and Biot - Savart laws are presented.

5. The proportionality constant M is provided and its variation with geometry and Biot number ( ? ? ) is discussed.