The 1913 Einstein–Besso Working Manuscript, containing more than 50 pages of handwritten text by Einstein and Besso, is part of a private collection of letters, manuscripts and books on twentieth-century theoretical physics that is due to be auctioned by Christie's in New York on 4 October.
Built up by publishing millionaire Harvey Plotnick, the Harvey Plotnick Library on the Development of Quantum Physics and the Theory of Relativity is considered the world's most important private collection of papers on modern physics. It includes around 2,500 items written by more than 100 of the twentieth century's most significant physicists. The total value of the collection is estimated at around US$2 million.
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