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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...