The Smithsonian Libraries Research Annex (SLRA) holds over 50,000 monographs, over 300,000 periodical holdings, and is the most subject-diverse branch within the Smithsonian Libraries system. SLRA’s collection of late 19th and early-mid 20th Century trade periodical literature is a scarce collection that includes U.S. Patent Office Library legacy serials. These trade periodicals document the material culture of the Industrial Era in the United States and Great Britain, giving nuance to the literal machinations of Victorian and turn-of-the century middle class life. All aspects of American life, as well as major developments in industry like the steam engine, electricity, and the mechanical printing press are represented.