A New York bookseller, Warshaw assembled this collection over nearly fifty years. The Warshaw Collection of Business Americana: Real Estate 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

The J. Horace McFarland Collection includes over 3,100 photographic images of private and public gardens throughout the United States, as well as some from foreign countries, dating from 1899 to 1963. Many of these images, generated for Mount Pleasant Press (later the J. Horace McFarland Company), were used to illustrate trade catalogs published by the firm as well as journal and newspaper articles. The collection also contains color records that were used as reference aids during the printing process, plant patents, and various publications of the McFarland Company.

The collection documents in photographs, scrapbooks, notebooks, correspondence, stock ledgers, annual reports, and financial records, the evolution of the telegraph, the development of the Western Union Telegraph Company, and the beginning of the communications revolution. The collection materials describe both the history of the company and of the telegraph industry in general, particularly its importance to the development of the technology in the nineteenth and twentieth centuries. The collection is useful for researchers interested in the development of technology, economic history, and the impact of technology on American social and cultural life.

A collection of approximately 28,000 glass plate negatives showing views of a variety of subjects.

The papers of art critic, writer, and historian Elizabeth McCausland measure 45 linear feet and date from 1838 to 1995, with the bulk of the material dating from 1920 to 1960. The collection provides a vast accumulation of research data on various artists and aspects of American art, especially the early American modernists and the Federal Arts Projects. Papers include McCausland's extensive research and writing files, particularly on Marsden Hartley, E. L. Henry, Lewis Hine, George Inness, and Alfred H. Maurer. McCausland's correspondence with artists includes a substantial amount with Arthur Dove and Alfred Stieglitz. Her collaborative work with Berenice Abbott on the Changing New York book and series of photographs is well-documented within the collection. Also found are general writings, subject files, files relating to exhibitions, teaching, and committees, photographs, art work, personal papers, and printed material. Additional McCausland material donated later from the estate of Berenice Abbott include biographical materials, project files, writings, and printed materials.

The records of Sohmer & Co., date from 1872 through 1989. They fall into fourteen series based primarily on function. Legal, financial, inventory & appraisal, manufacturing, marketing, advertising, and sales are the major series. Photographs, awards, family papers, publications about Sohmer, general publications, "miscellaneous" and correspondence are the remaining series. The records are especially …

The Matthew Williams Stirling and Marion Stirling Pugh papers, 1876-2004 (bulk 1921-1975), document the professional and personal lives of Matthew Stirling, Smithsonian archaeologist and Chief of the Bureau of American Ethnology (1928-1957), and his wife and constant collaborator, Marion Stirling Pugh. The bulk of the material is professional in nature and includes material from Matthew's early career in the 1920s, the careers of Matthew and Marion together from when they married in 1933 to Matthew's death in 1975, and Marion's life and work from 1975 until her death in 2001. The majority of the documentation relates to the investigation of the Olmec culture in Mexico by the Stirlings, including the discoveries of eight colossal Olmec heads. In addition, the collection documents their work in Panama, Ecuador, and Costa Rica, looking for connections between Mesoamerica and South America. Materials include field notes, journals, correspondence, photographs, writings, clippings, ephemera, articles, and scrapbooks.

These records document the governance and programmatic activities of the Museum of the American Indian/Heye Foundation (MAI) from its inception in 1904 until its sublimation by the Smithsonian Institution in 1990. The types of materials present in this collection include personal and institutional correspondence, individual subject files, minutes and annual reports, financial ledgers, legal records, expedition field notes, research notes, catalog and object lists, publications, clippings, flyers, maps, photographs, negatives and audio-visual materials. These materials span a varied range of subjects relating to the activities of the museum which are more fully described on the series level.

The engineering firm that became Lockwood Greene was founded by David Whitman, a mill engineer, in 1832. Amos D. Lockwood, a consultant, succeeded Whitman and entered a partnership with Stephen Greene in 1882. The firm specialized in industrial engineering and construction; they designed and built a wide variety of structures and work environments worldwide over the next century. Lockwood Greene was acquired by CH2M HILL in December, 2003. Before its acquisition by CH2MHILL it was reportedly the oldest industrial engineering, construction, and professional services firm in the United States.

The papers of historian Henry P. Whitehead measure 156.91 linear feet and date from 1843 to 2010 (bulk 1945-1986). The collection documents Whitehead's careers, as well as his family and personal life. The collection also includes the personal papers of Tomlinson D. Todd, Elizabeth B. Delaney and the Howard Theatre Foundation. The combined collection is comprised of black theatrical memorabilia; materials relating to civil rights activities in the District of Columbia; and the African American experience in general. Included are playbills, sheet music, admission tickets, newspapers, magazines, books, photographs, clippings, flyers, brochures, pamphlets, sound recordings, research files, and other material.