THE MEASUREMENT OF GALVANOTROPIC EXCITATION
W. J. Crozier, Theodore J. B. Stier · The Journal of General Physiology · 1928
The expression of galvanotropic excitation in energy units is obtained by the measurement of the current densities required to balance phototropic excitation (or reciprocally). With the triclad Leptoplana preliminary measurements show that the current is proportional to the logarithm of the light intensity.