Prof. Albert Einstein has presented the Leyden State Museum of the History of Physics with a file of 30 letters and cables pertaining to his work on the theory of relativity sent him between 1911 and 1926 by two world famed Leyden scholars. The Netherlands physicists. Drs. H.A. Lorentz and H. Kammerlinghonnes, maintained contact with Prof. Einstein on various theoretical and experimental aspects of his work.
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