Copy of paper to James Challis
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Copy of paper to James Challis
Copy of letter to J.F.W. Herschel
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Copy of letter to J.F.W. Herschel
Copy of letter to James Challis
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Copy of letter to James Challis
Copy of letter to U.J.J. Le Verrier
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Copy of letter to U.J.J. Le Verrier
Copy of letter to U.J.J. Le Verrier
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Copy of letter to U.J.J. Le Verrier
Copy of letter to U.J.J. Le Verrier
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Copy of letter to U.J.J. Le Verrier
Copy of letter to D.F.J. Arago
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Copy of letter to D.F.J. Arago
Copy of letter to J.F.W. Herschel
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Copy of letter to J.F.W. Herschel
Copy of letter to J.F.W. Herschel
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Copy of letter to J.F.W. Herschel
Typescript copy of article
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Typescript copy of article