German inventor and industrialist (1816-1892) whose name has been adopted as the SI unit of electrical conductance, the siemens; he was also the founder of the electrical and telecommunications company Siemens. ALS in German, signed “Dr. W. Siemens,” one page both sides, 5.5 x 8.75, December 8, 1885. Letter to Paul Lindau, declining to make a regular contribution and explaining the reasons. Lindau was the founder and editor of the well-known monthly Nord und Süd. In fine condition.
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