The Charles F. 
Brush 
, Sr., Papers consist of correspondence, laboratory notes, patent information, litigation records, financial material, newspaper
clippings, company records, scientific articles, genealogical research and biographies written about Brush , photographs, audio-visual material, and artifacts. This bulk of this collection dates from the beginning of his success
as the inventor of the arc light system in the 1870's through his death in 1929.
Of note in this collection is the rich correspondence which the widowed Brush conducted with family, friends and colleagues as his children grew up and left home. A keen observer in the laboratory and
of the world around him, Brush shared his observations on many topics with his extended family and peers, and was a faithful correspondent to many.
Supporting the documentary evidence of his correspondence are the laboratory notes, business ledgers, publications, legal
records and patents created in the course of his work as a successful inventor and businessman. The collection offers a near
complete source of information on the research Brush conducted into the kinetic theory of gravitation with laboratory notes, manuscripts, published works, correspondence and
photographs illustrating the chief interest of his later years.
Other interests for which Brush is well known, including establishment of The Brush Foundation, are described in limited detail within the collection but provide ample evidence of his determination to support
his interests with his many talents.