THE radio-meteorograph developed by the Bureau of Standards 1 has been modified so as to transmit during its balloon ascent signals indicating the potential gradient in the free air. This gradient has ...

IN view of suggestions which have been made from time to time that a relationship may exist between the intensity of the earth's electric field and the phenomena of the aurora, or of terrestrial ...

ZnO varistor ceramics were synthesised by cold sintering/spark plasma sintering and post-annealing treatment. Intriguingly, the ZnO varistor ceramics present ultrahigh potential gradient, high ...