The collection consists of 146 salt-paper prints (structural and decorative details) of the United States Capitol Dome, between 1855 and 1862. Dimensions range from 6 ¾" x 9 ½" to 17 1/8" x 10".

The collection contains business records and photographic materials documenting the International Salt Company. The business records include correspondence, account and ledger books, a payroll book, patent and trademark information, print advertising and marketing materials, and a salesman salt display kit. The photographic materials include a series of photographs by William M. Rittase, a series of photographs by Harold Haliday Costain, a small photograph album, snapshots, and slides. The images cover all facets of the salt manufacturing and packaging operations, and include photographs taken in New York State, Michigan, and Louisiana.

A New York bookseller, Warshaw assembled this collection over nearly fifty years. The Warshaw Collection of Business Americana: Salt forms part of the Warshaw Collection of Business Americana, Subseries 1.1: Subject Categories. The Subject Categories subseries is divided into 470 subject categories based on those created by Mr. Warshaw. These subject categories include topical subjects, types or forms of material, people, organizations, historical events, and other categories. An overview to the entire Warshaw collection is available here: Warshaw Collection of Business Americana

Photographs of various subjects, including portraits of American Indians made from negatives by the Bureau of American Ethnology and United States National Museum. Depicted individuals include Lamar Richards (also known as Ostin, Tonkawa) and Grant Richards (also known as Sentele, Tonkawa); Turning Hawk, Crow Dog, Spot Tail, Red Leaf, and White Th...

The Ivan C. Karp papers and OK Harris Works of Art gallery records measure 80.3 linear feet and are dated 1960-2014. The collection documents the operation and activities of the contemporary art gallery founded by Ivan C. Karp in the SoHo area of Manhattan. Exhibition files, artist files, printed material and photographic materials reveal the wide range of artists represented by OK Harris and the gallery's role in introducing Photo-realism to the public. Aso included are administrative files, prints by OK Harris artists, business and personal correspondence, 39 journals by Karp spanning a period of 62 years, and other personal papers. Material pre-dating the 1969 establishment of OK Harris Works of Art consists of printed items and a few letters.

The papers of artist and educator Don Reitz measure 11.6 linear feet and date from circa 1935 to 2015. The collection documents Reitz's work as a professional artist and educator through biographical material, correspondence; writings, interviews and lectures; documentation on workshops and performances; studio records; gallery and exhibition files; printed material, photographic material, and artwork.

The Thomas Carr Howe papers measure 4.4 linear feet and date from 1932 to 1984. Howe was director of the California Palace of the Legion of Honor in San Francisco for nearly 40 years, and he served as one of the Monuments Men in the Monuments, Fine Art and Archives (MFAA) Section of the U.S. Army during World War II. The collection documents Howe's MFAA work in Germany and Austria locating and recovering cultural artifacts and artwork stolen by the Nazis. There is significant correspondence with friends and colleagues, as well as fellow Monuments Men such as Samson Lane Faison, Edith Standen, and George Stout. The papers also includes reports, inventories of stolen artwork, maps, annotated photographs, a scrapbook, and photographs. The papers also document Howe's later work at the California Palace of the Legion of Honor.

The papers document the life and work of William R. Hutton, a civil engineer during the late 1800s to the early 1900s. Materials include diaries, notebooks, correspondence, letterpress copy book, printed materials, publications, specifications, photographs, drawings, and maps that document the construction of several architectural and engineering projects during this period. Most notable are the records containing information related to the construction of the Chesapeake and Ohio Canal, Hudson River Tunnel, the Washington Aqueduct, the Kanawha River Canal, and the Washington/Harlem River Bridge. There are also several records about railroads in the state of Maryland, the District of Columbia and elsewhere, including the Western Maryland Railroad, Baltimore and Ohio Railroad, Colorado Midlands Railway, Baltimore and Drum Point Railroad, the Northern Adirondack Railroad, and the Pittsfield and Williamstown Railroad. The records can be used to track the progression of these projects, and engineering innovation during the late 1800s to the early 1900s.

The papers of sculptor, writer, and earthworks artist Robert Smithson and his wife, sculptor, filmmaker, and earthworks artist Nancy Holt measure 15.1 linear feet and date from 1905 to 1987, with the bulk of the material dating from 1952 to 1987. The papers consist of Smithson's biographical material; business and personal correspondence, much of it with artists; interview transcripts; extensive writings and project files; financial records; printed material; a scrapbook of clippings; holiday cards with original prints and sketches; photographic material; and artifacts. Also found are project files related to Nancy Holt's motion picture film Pine Barrens and her seminal environmental work of art Sun Tunnels, including a video documentary about Sun Tunnels.

Approximately 11,000 images collected by Thomas Norrell consisting of original photographic prints and photographic postcards, original film and glass plate negatives, and duplicate/copy photographic prints and negatives. The majority are external views of single locomotive engines of North American railroad and industrial companies. Images of international railroad company locomotives and of representative locomotives from various locomotive works and builders are also included. The collection contains a small number of subject-specific images covering such topics as train wrecks, funeral trains, experimental locomotives, miniature trains, and locomotives at the 1933 and 1939 World's Fairs.