The Behavior of Frog Eggs in an Electrical Field

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Abstract
Eggs of Rana pipiens in pond water were subjected to 1 milliampere at a potential gradient of 2 volts per cm. Within the jelly layers the egg migrated toward the cathode, then the whole egg, jelly and all, was carried to the same pole. Within the egg the granular material collected at the cathode. Although the conditions of zeta potential measurement were not satisfied, it is concluded that the sign of the charge on the whole egg and on the internal granules is positive.

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