English: 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.
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[I, Alfred Leitner took this photograph as a part of my movie on Type I Superconductors]
The movie had U.S. Copyright 1964, which expired and was not renewed. PUBLIC DOMAIN.
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
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