This research was done using handmade instruments to read the viscosity of theese metals. The only known viscosity in 1949 was the viscosity research done by the Pittsburgh Steel companies of pig iron. According to prof.Hilsch, the head of Physics Department, all posible was given in this research.
Subsequently Dr.Silberherz obtained a second Doctor degree in Dental Medicine, was teaching at the Dental School andsearch had a succesful Dental Practice.
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