Query: *
[Five early light bulbs displayed, black & white photoprint]
Level:
item
Creators:
Hammer, William J. (William Joseph), 1858-1934 (electrical engineer)
Dates:
Circa 1920
Size:
1 Item (Silver gelatin on paper, 7.7" x 13.1")
Collection ID:
NMAH.AC.0069
Repository:
Archives Center, National Museum of American History

Digital Content Available