Change of electrical resistance in a magnetic field : with experiments on the change of resistance of electrolytes . - 26 - that by this arrangement the .effects of polarization in the two cell;would largely offset each other. Since the resistances wereveryhigh - from 100,000 to 500,000 ohms - a potential difference of from20 to £0 volts was used. With such large resistances and ,any uncompensated polarization of the electrodes should be negli-gible . This method proved very unsatisfactory. It was prac-tically impossible to obtain a balance, as the galvanometer indexwould wander from on
Change of electrical resistance in a magnetic field : with experiments on the change of resistance of electrolytes . - 26 - that by this arrangement the .effects of polarization in the two cell;would largely offset each other. Since the resistances wereveryhigh - from 100,000 to 500,000 ohms - a potential difference of from20 to £0 volts was used. With such large resistances and ,any uncompensated polarization of the electrodes should be negli-gible . This method proved very unsatisfactory. It was prac-tically impossible to obtain a balance, as the galvanometer indexwould wander from one side of the zero position to the other in amost erratic and annoying fashion. Several weeks were spent intrying to discover the cause of this unsteadiness. At first itwas ascribed to sudden slight changes in temperature. To avoidthese, each cell was placed in a box of heavy pasteboard and care-fully packed in cotton batting. The box containing the cell whichwas placed in the magnetic field was cut away on both sides to admitthe pole pieces of the magnet. This did not permit it to be quiteas well protected as
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