1. Goethe as a Scientist

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2. Excerpt from Michael Heidelberger's scrapbook during his postdoctoral stay in Europe

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3. Menu from Michael Heidelberger's good-bye dinner after his postdoctoral stay in Europe

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4. Letter from Richard Willstatter, Eidgenossische Technische Hochschule to Michael Heidelberger

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5. Certificate of completion of military training camp at Plattsburgh, NY

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6. Wedding March [Sheet music]

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7. Excerpt from Michael Heidelberger's laboratory notebook

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8. Letter from United States Army, Office of the Surgeon General to Michael Heidelberger

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9. Estimated Number of Cases of Syphilis Among Adults

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10. List of Approved Pamphlets, Exhibits, etc. for Social Hygiene Education

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11. Memorandum from Michael Heidelberger to the United States Army, Office of the Surgeon General

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12. Chemotherapy of Trypanosome and Spirochete Infections: Chemical Series. I. N-Phenylglycineamide-p-Arsonic Acid

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13. Letter from Louise Pearce to Michael Heidelberger

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14. A Method for the Preparation of Crystalline Oxyhemoglobin

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15. Letter from Simon Flexner to Michael Heidelberger

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16. Letter from Jacques Loeb to Michael Heidelberger

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17. Lab notes from Michael Heidelberger and Oswald Avery's experiments on pneumococcus bacteria and polysaccharides (2 of 4)

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18. Letter from Karl Landsteiner to Michael Heidelberger

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19. Lab notes from Michael Heidelberger and Oswald Avery's experiments on pneumococcus bacteria and polysaccharides (1 of 4)

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20. On the Antigenic Properties of Hemoglobin

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