Limiting-current measurement migration effects

It would be interesting if in a solid metal both the electro-self-trans-port and the electro-isotope-transport could be measured. Lodding has tried to do this by subjecting In at 137°C. to a direct current of 5000 amps./cm. for about eight months. He preliminarily reported a self-transport and a transport of the light isotope towards the cathode (45) meanwhile in more elaborate measurements he found the reverse direction for the self-transport in solid indium (46). It remains a question in which direction the isotope migration in solid indium goes, because the isotope effect reported in Reference 45 was at the limit of measurability. 

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