Keywords: Tin 4.2K Electromagnet.jpg en A cylinder of tin - in a Dewar filled with liquid helium - has been placed between the poles of an electromagnet The magnetic field is about 80 gauss Own I Alfred Leitner took this photograph as apart of my movie on Type I Superconductors 1964 The movie had U S Copyright 1964 which expired and was not renewed PUBLIC DOMAIN Low temperature physics |