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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Inventor of Thallium and the Radiometer CROOKS, Sir William  (1832-1919).  British chemist, invented thallium and the radiometer.  Fine full signature and closing from an autograph letter signed. Fine for framing...................... $85.00

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