Interviewees in this series contributed in various roles to the refinement of plutonium 239 isotope at the Hanford Engineer Works in the state of Washington. In January of 1943, General Groves chose the site for construction of three full-scale plutonium piles for the mass production of plutonium 239--an isotope for the chain reaction ...

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

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

A New York bookseller, Warshaw assembled this collection over nearly fifty years. The Warshaw Collection of Business Americana: Tobacco Trade and Industry 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

Arthur Ehrat invented and patented a breakaway basketball rim, fashioning his prototypes from bolts, metal braces and one key part: a piece of the heavy-duty coil spring on a John Deere cultivator. His invention helped to revolutionize the way basketball is played because players could slam dunk the ball with fewer injuries and without bending the rims or breaking backboards. This collection includes correspondence, legal documents --such as patent papers, litigation files and licensing agreements --photographs and sketches that relate to the basketball invention, as well as materials regarding his two field spreader patents and other invention ideas.

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.

Collection consists of approximately 13,500 images (original photographs, copy prints, and film and glass plate negatives) for freight, passenger, private, and street and rapid transit cars manufactured by the Pullman Palace Car Company. The collection contains primarily early railroad Americana, including interior and exterior views of private and business cars as well as passenger and street cars. The collection is an important part of the historical record of the railroad car-building industry as well as the history of architecture and interior design.

This collection is comprised of digital surrogates previously available on the 89 rolls of microfilm described in the NARA publication M1911. These digital surrogates reproduced the records of the Tennessee field offices of the Bureau of Refugees, Freedmen, and Abandoned Lands, 1865–1872. Included are the records of the offices of staff officers and subordinate field offices. These records consist of bound volumes and unbound records, including letters and endorsements sent and received, orders and circulars, monthly reports, and other records relating to freedmen's complaints and claims.

This collection is comprised of digital surrogates previously available on the 203 rolls of microfilm described in the NARA publication M1913. These digital surrogates reproduced the records of the Virginia field offices of the Bureau of Refugees, Freedmen, and Abandoned Lands, 1865–1872, including previously unfilmed records of the Virginia staff offices of the quartermaster and disbursing officer, and the subordinate field offices. These records consist of bound volumes and unbound records, including letters and endorsements sent and received, orders and circulars, monthly reports, and other records relating to freedmen's complaints and claims.

The collection is comprised of digital surrogates previously available on the 28 rolls of microfilm described in the NARA publication M1912. These digital surrogates reproduced the records of the Texas Field Offices of the Bureau of Refugees, Freedmen, and Abandoned Lands, 1865–1870, including previous unfilmed records of the Office of the Assistant Commissioner, and records of the office of staff officers and subordinate field offices. These records consist of bound volumes and unbound records, including letters received and endorsements, monthly school reports, and other records relating to freedmen's complaints and contracts.