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Dates:
1851-1957
Level:
series
Collection ID:
NMAH.AC.0069
Repository:
Archives Center, National Museum of American History

This series consists of correspondence, mostly incoming, from 1879-1935, but also includes diaries, notebooks, biographical information, patent material, pamphlets, writings by Hammer, and a badge, 1925. The correspondence consists mostly of letters to and from Hammer regarding his project of thirty-four years, his Historical Collection of Incandes...