1. Charles J. Heidelberger (Michael's brother) and Michael Heidelberger Date: [ca. 1905] Genre: Photographic printsPortraits
2. Michael Heidelberger's high school graduation photo Date: 1905 Genre: Photographic printsPortraits
4. Excerpt from Michael Heidelberger's scrapbook during his postdoctoral stay in Europe Creator: Heidelberger, Michael Date: 1911 Genre: DiariesExcerpts
6. Menu from Michael Heidelberger's good-bye dinner after his postdoctoral stay in Europe Date: [1912] Genre: Ephemera (general)
7. Letter from Richard Willstatter, Eidgenossische Technische Hochschule to Michael Heidelberger Creator: Willstatter, RichardEidgenössische technische Hochschule Zürich Date: 4 August 1912 Genre: Letters (correspondence)
9. Certificate of completion of military training camp at Plattsburgh, NY Creator: United States. Army Date: 6 August 1915 Genre: Certificates