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Creators:
Hammer, William J. (William Joseph), 1858-1934 (electrical engineer)
Dates:
circa 1847-1989
Size:
36 Cubic feet (124 boxes, 3 map-folders)
Collection ID:
NMAH.AC.0069
Repository:
Archives Center, National Museum of American History

Original documents and papers generated by William J. Hammer and by various companies and individuals with whom he was associated. Includes material related to the research and inventions of Edison, Bell, Tesla, the Curies, etc.

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Dates:
1926-1974, undated
Level:
series
Size:
22 Linear feet (Boxes 1-22; Reels 5488-5545)
Collection ID:
AAA.downgall
Repository:
Archives of American Art

This series consists of the business and personal correspondence of Edith Gregor Halpert and the Downtown Gallery. For the most part, this series is general business correspondence concerning routine activities of the Downtown Gallery, including the American Folk Art Gallery and the Daylight Gallery, both operated by the Downtown Gallery on the sam...

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Creators:
Ayer (N W) Incorporated.
Dates:
1817-1851
1869-2006
Size:
270 Cubic feet (1463 boxes, 33 map-folders, 7 films)
Collection ID:
NMAH.AC.0059
Repository:
Archives Center, National Museum of American History

Collection consists of records documenting one of the oldest advertising agencies created in Philadelphia. The company then moves to New York and expanses to international markets. During its history NW Ayer & Sons acquires a number of other advertising agencies and is eventually purchased. The largest portion of the collection is print advertisements but also includes radio and television. NW Ayer is known for some of the slogans created for major American companies.

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Dates:
1909-1991
undated
Level:
series
Size:
3.6 Linear feet ((Boxes 1-4))
Collection ID:
AAA.cunnimog
Repository:
Archives of American Art

Correspondence found in this series is with both family members and business colleagues, reflecting both aspects of Cunningham's life. See Appendix for a list of notable correspondents from Series 2.