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Carbon ore: 1 March 1881

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8648 carbon ore: 1 March 1881

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90S carbon ore: 1 March 1881

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Painted on black: 11 March 1881

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(?) that I have and in stellar (?) up to present: 11 March 1881

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Eastman: 11 March 1881

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New Eastman No. 1 Experiment: 5 April 1881

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New Eastman No. 2 Experiment: 5 April 1881

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Old Lantern No. 2 Experiment: 5 April 1881

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New Eastman No. 1 Experiment: 6 April 1881

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New Eastman No. 2 Experiment: 6 April 1881

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Old Eastman No. 1 Experiment: 6 April 1881

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Old Eastman No. 2 Experiment: 6 April 1881

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New Eastman oxalate: 7 April 1881

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Old lantern pyrogallic experiments: 7 April 1881

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Old lantern oxalate experiment: 7 April 1881

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Old lantern oxalate experiment: 7 April 1881

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Photographic experiment: 7 April 1881

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Exposed oxidate: 7 April 1881

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Photographic experiment: 11 April 1881

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Photographic experiment: 17 April 1881

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Photographic experiment: 19 April 1881

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Photographic experiment: 23 April 1881

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Stellar Spectra Dispersion ~90A/mm-11 glass slide: circa 1879

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