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![]() HERSCHEL, Sir John Frederick William (1792-1871). Astronomer. Fragment of a letter, Signed, 2 pages 8vo, no place, no date. Regretting that he cannot send the 'great massive brass Y that formed the support of the laden end of the old brass equatorial polar axis' as it has disappeared. [No: 6865] The image is of the last page only.
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