Factors Influencing the Electrical Resistance of the Potato

Extensive experimentation upon the electrical resistance of raw potatoes has given the following results: (1) the resistance of a uniformly shaped section varies inversely as its cross-sectional area; (2) the resistance is independent of the applied voltage; (3) the resistance of sections taken from a relatively homogeneous part of the tuber varies directly with the length; (4) the cortical layer lengthwise of the potato has the least resistance, the resistances of internal medullary area, the external medullary area, and the outer skin following in the order named. No investigation was made upon the resistance of the cortical layer transverse to the length of the tuber