The man that invented Zone melting was a political supporter of what?
Zone melting:  Zone refining was invented by John Desmond Bernal and further developed by William Gardner Pfann in Bell Labs as a method to prepare high purity materials, mainly semiconductors, for manufacturing transistors. Its early use was on germanium for this purpose, but it can be extended to virtually any solute-solvent system having an appreciable concentration difference between solid and liquid phases at equilibrium. John Desmond Bernal:  In addition, Bernal was a political supporter of Communism and wrote popular books on science and society.
Communism