Nikola Tesla - Free-Energy Devices

ELECTROLYTIC REGISTERING METER. 423compared with the resistances in series with them. It will beunderstood that after. each measurement or registration of a givenvariation of resistance in one or both conductors, the direction ofthe current should -be changed or the instrument reversed, so thatthe deposit will be taken from the conductor which has gainedand added to that which has lost. This principle is capable ofmany modifications. For instance, since there is a section of thecircuit to wit, the conductor c or c' that varies in resistance inproportion to the current strength,. such variation maybe utilized,as is done in many analogous cases, to effect the operation ofvarious automatic devices, such as registers.It is better, however,for the sake of simplicity to compute the energy by measurementsof resistance.The chief advantages of this arrangement are, first, that it ispossible to read off directly the amount of the energy expendedby means of a properly constructed ohm-meter and without resortingto weighing the deposit ; secondly it is not necessary toemploy shunts, for the whole of the current to be measured maybe passed through the instrument ; third, the accuracy of the instrumentand correctness of the indications are but slightlyaffectedby changes in temperature. It is also said that such metershave the merit of superior economy and compactness, as well asof cheapness in construction. Electrolytic meters seem to needevery auxiliary advantage to make them permanently popular andsuccessful, no matter how much ingenuity maydesign.be shown in their