131. Letter from Elvin A. Kabat to Michael Heidelberger Publication: Produced: [22 July 1938] Subject(s): Immune SeraAntibodiesCrystallography, X-RayMolecular Weight Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
132. Letter from Richard Willstatter to Michael Heidelberger Publication: Produced: 25 October 1932 Subject(s): PolysaccharidesStreptococcus pneumoniae Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
133. Letter from Hugh S. Taylor, Princeton University to Michael Heidelberger Publication: Produced: 4 November 1939 Subject(s): Chemistry, Organic Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
134. Letter from Charles D. Hurd, Northwestern University to Michael Heidelberger Publication: Produced: 29 November 1939 Subject(s): Chemistry, Organic Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
135. Letter from Kai O. Pedersen to Michael Heidelberger Publication: Produced: 20 October 1936 Subject(s): AntibodiesMolecular WeightUltracentrifugation Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
136. Letter from Kai O. Pedersen to Michael Heidelberger Publication: Produced: 6 December 1939 Subject(s): World War IIPoliticsAntigen-Antibody Reactions Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
137. Letter from Kai O. Pedersen to Michael Heidelberger Publication: Produced: 27 January 1935 Subject(s): Molecular WeightThyroglobulinUltracentrifugation Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
138. Letter from Kai O. Pedersen to Michael Heidelberger Publication: Produced: 19 November 1934 Subject(s): UltracentrifugationElectrophoresis Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
139. Letter from Richard Willstatter to Michael Heidelberger Publication: Produced: 14 November 1939 Subject(s): World War II Archival Collection: The Michael Heidelberger Papers (Profiles in Science)
140. Letter from Oswald T. Avery to Michael Heidelberger Publication: Produced: 29 August 1935 Subject(s): Precipitin Tests Archival Collection: The Michael Heidelberger Papers (Profiles in Science)