Abstract
Electric conductivity of water between a pair of electrodes varies as the electrodes and the water are in a relative motion. A new method of measuring water discharge and relative velocity has been developed and was found to have excellent sensitivity, quick indication and applicability to very wide range of water discharge and relative velocity. The influences of water temperature and ion concentration are cancelled on diagrams prepared for the geometrical construction of each set consisting of a guide pipe, a pair of electrodes and a thermometer. Wave motion, turbulence and other instantaneous phenomena of water motion are easily observed and recorded with some modifications.
From some properties of the phenomenon the writers are convinced that it can be interpreted by the movement of ions and carried out some calculation to obtains the characteristic curves which proved a very close similarity to what had been observed in their experiments. As a result of calculation, the conductivity variation was understood to have been given rise to by the conduc-tivity difference between the water itself and the water domain through which the ions from the electrodes' surfaces move.
