Resistances of from 1×108 to 3×1010 ohms have been obtained by sealing capillary bridges (inside diameter 0.005 to 0.088 mm) between calomel electrodes made up with dilute KCl—saturated calomel solutions. These resistors can be used satisfactorily with an electrometer or sensitive galvanometer and condenser set‐up. They do not exhibit polarization and their resistances do not change with age. The temperature coefficient is that of the KCl solution used in the preparation of a resistor.