Stephen Koschal ~ Quality Autographs & Signed Books Serving Collectors, Libraries, Institutions, Autograph Galleries and Dealers with Autographs and Signed Books in all Fields of Collecting Since 1967. 7155 Sand Crest View, Colorado Springs, CO 80923 USA ~ Phone (561) 315-3622 ~ skoschal@aol.com

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KELVIN, BARON William Thomson. (1824-1907).  Irish physicist & mathematician.  Evolved theory of scientific oscillation which formed the basis of wireless telegraphy.  Superb, bold signature adding the date “April 21, 1902.”  A scarce signature............ $150.00

Stephen Koschal ~ Quality Autographs & Signed Books Serving Collectors, Libraries, Institutions, Autograph Galleries and Dealers with Autographs and Signed Books in all Fields of Collecting Since 1967. 7155 Sand Crest View, Colorado Springs, CO 80923 USA ~ Phone (561) 315-3622 ~ skoschal@aol.com