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Creators:
Hammer, William J. (William Joseph), 1858-1934 (electrical engineer)
Dates:
Circa 1900
Level:
item
Size:
1 Item (Silver albumen? on paper., 10.1" x 13.3")
Collection ID:
NMAH.AC.0069
Repository:
Archives Center, National Museum of American History

Lab contains a wide variety of items -- books, light bulbs, x-rays, photographs, recording machines, etc.