The case of a long iron bar has been experimentally studied with great care by C. G.
The existence of this pressure has been demonstrated experimentally by W.
measured experimentally by two methods.
Seguin was unable to verify this experimentally, but in 1857 G.
The concentration is known, and the conductivity can be measured experimentally; thus the average velocity with which the ions move past each other under the existent electromotive force can be estimated.