Albert Einstein and Harm Kamerlingh Onnes (a nephew of the low-temperature physicist) visited on Tuesday, 2 November 1920, a week after Einstein delivered his inaugural lecture as external professor in Leiden.
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Albert Einstein and Harm Kamerlingh Onnes (a nephew of the low-temperature physicist) visited on Tuesday, 2 November 1920, a week after Einstein delivered his inaugural lecture as external professor in Leiden.