151. Letter from Simon Flexner, Rockefeller Institute for Medical Research to Michael Heidelberger

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152. Letter from Michael Heidelberger to Simon Flexner, Rockefeller Institute for Medical Research

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153. Quantitative Studies on the Precipitin Reaction: The Determination of Small Amounts of a Specific Polysaccharide

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154. Some Physicochemical Properties of Specific Polysaccharides

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155. A Quantitative Study of the Precipitin Reaction between Type III Pneumococcus Polysaccharide and Purified Homologous Antibody

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156. The Soluble Specific Substance of Pneumococcus: V. On the Chemical Nature of the Aldobionic Acid from the Specific Polysaccharide of Type III Pneumococcus

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157. The Chemical Nature of Immune Substances

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158. Letter from Richard Willstatter to Michael Heidelberger

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159. The Soluble Specific Substance of Pneumococcus: IV. On the Nature of the Specific Polysaccharide of Type III Pneumococcus

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160. Letter from Phoebus A. Levene, Rockefeller Institute for Medical Research to Michael Heidelberger

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161. The Soluble Specific Substance of Pneumococcus: Third Paper

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162. Immunological Relationships of Cell Constituents of Pneumococcus: Second Paper

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163. Lab notes from Michael Heidelberger and Oswald Avery's experiments on pneumococcus bacteria and polysaccharides (3 of 4)

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

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165. Letter from Simon Flexner, Rockefeller Institute for Medical Research to Michael Heidelberger

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166. Excerpts from Michael Heidelberger's diary during his sabbatical studies in Europe

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

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168. On the Antigenic Properties of Hemoglobin

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169. Letter from Karl Landsteiner to Michael Heidelberger

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170. Letter from Simon Flexner to Michael Heidelberger

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171. Letter from Jacques Loeb to Michael Heidelberger

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

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173. A Method for the Preparation of Crystalline Oxyhemoglobin

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174. Letter from Louise Pearce to Michael Heidelberger

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

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

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177. Estimated Number of Cases of Syphilis Among Adults

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

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

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180. Excerpt from Michael Heidelberger's laboratory notebook

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181. Wedding March [Sheet music]

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

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

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

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

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186. Goethe as a Scientist

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