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Radiograph of two sheets of strip lead (45): undated

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Radiograph of 6 month old child (47): undated

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Radiograph of a leg (48): undated

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X-ray outfit at NYU (50): undated

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Taking radiograph at NYU (49): 1896

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Pine Hill Highway Bridge (25): 1897

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Photographic action of radium A over circular gauge and radium B over rectangular gauge (43): 1900

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Moon-possible copy of Draper's original (3): 15 June

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Moon-possible copy of Draper's original (6): 22 June

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Moon (4): undated

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Moon (5): undated

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Moon-possible copy at about 1 1/2 enl. (106): undated

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Colored spectra (97)

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Solar spectrum (1): undated

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Spectrum (13): undated

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Spectra (15): undated

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Solar spectrum (2): undated

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Early solar spectrum (51): undated

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Early solar spectrum (52): undated

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Early solar spectrum (53): undated

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Early solar spectrum (54): undated

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Early solar spectrum (55): undated

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Early solar spectrum (56): undated

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Spectra of Alpha Canis Majoris, Alpha Canis Minoris, and Alpha Aurigae (26): undated

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