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TYNDALL, John (1820-1893). Natural philosopher. Autograph Letter Signed to an unnamed correspondent ('Sir'), 1 page 8vo, Royal Institution, 13 April no year. Hoping he can come to a meeting with Mr Longman to "help us to a final decision regards the size and thickness of the paper" for his upcoming work, and asking him to bring a copy of it with him. [No: 3761]
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