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22521
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PER_91_letter 1_page_005.jpg
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22522
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PER_91_letter 1_page_006.jpg
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22523
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PER_91_letter 1_page_007.jpg
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22524
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PER_91_letter 1_page_008.jpg
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22525
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PER_91_letter 1_spread pages 2-3.jpg
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22526
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PER_91_letter 1_spread pages 6-7.jpg
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22527
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PER_91_letter 2_page_001.jpg
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22528
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PER_91_letter 2_page_002.jpg
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22529
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PER_97_3_8_letter 1_page_001.jpg
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22530
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PER_97_3_8_letter 2_page_001.jpg
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22531
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Steel converting vessel
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Bessemer steel converting vessel, showing the positions of t …
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22532
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Air-deflecting carriages
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Henry Bessemer’s air-deflecting railway carriages and compou …
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22533
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Page 2
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22534
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Page 3
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22535
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Page 4
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22536
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Page 5
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22537
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Page 6
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22538
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Page 7
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22539
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Page 8
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22540
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Page 1
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