H. von Helmholtz, 2 photoprints: 1.  Albumen cabinet print by Reichard & Lindner, Berlin, marked "Wm. J. Hammer" on verso. 2.  Albumen cabinet print by Giacomo Brogi, Firenze, also marked "Hammer" in pencil.
name: label: Collection Creator
content: Brogi, Giacomo
label: Collection Creator
content: Archives Center, National Museum of American History
label: Collection Creator
content: Memmert, Heinrich
label: Collection Creator
content: Reichard & Lindner.
setName: label: See more items in
content: Archives Center Portrait Collection
container: label: Container
content: Box 1, Folder 3
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials