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The change of resistance of thin films of zinc and cadmium condensed at low temperature has been studied. The resistance of a zinc film decreases irreversibly with rising temperature, but it also decreases slowly at a constant temperature above the temperature of deposition. If the surface upon which the film is deposited is of a metal similar to zinc, it influences the temperature resistance relation, but if of a metal not similar to zinc, it does not. The experiments favor the assumption that agglomeration and crystallization are responsible for the changes in resistance.
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H. Rees Mitchell (1938) studied this question.
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