Albert Einstein, Holograph letter to Michael Polanyi, 30 December 1914.
Image courtesy of the University of Toronto.
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© 2026 Consortium for History of Science, Technology and Medicine | Copyright Infringement
Albert Einstein, Holograph letter to Michael Polanyi, 30 December 1914.
Image courtesy of the University of Toronto.
© 2026 Consortium for History of Science, Technology and Medicine | Copyright Infringement