where all does it have it's branches?
B. Altman & Company Building on 34th Street and the central research library on 42nd Street was renamed the Humanities and Social Sciences Library.
New York Public Library
The library purchased and adapted the former B. Altman & Company Building on 34th Street. In 1995, the 100th anniversary of the founding of the library, the Science, Industry and Business Library (SIBL), designed by Gwathmey Siegel & Associates of Manhattan, opened to the public. Upon the creation of the SIBL, the central research library on 42nd Street was renamed the Humanities and Social Sciences Library.

when were bill of rights added to constitution December 15, 1791 what does it include? It comprises the first ten amendments to the United States Constitution. is it displayed anywhere? One is in the National Archives, and the other is in the New York Public Library. does the latter conduct any programme? Yes,  The Subway Library gave New York City Subway riders access to e-books, excerpts, and short stories. what effort do they make to reach the society? The library offers free work and life skills classes. These are offered in conjunction with volunteers and partnerships at the library.  An initiative was taken in July 2018, NYC library card holders are allowed to visit Whitney Museum, the Guggenheim and 31 other prominent New York cultural institutions for free.
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New York Public Library [SEP] Other research branches
Total item holdings, including the collections of the Branch Libraries, are . The Humanities and Social Sciences Library on 42nd Street is still the heart of the NYPL's research library system. The SIBL, with approximately volumes and 60,000 periodicals, is the nation's largest public library devoted solely to science and business. The NYPL's two other research libraries are the Schomburg Center for Research and Black Culture, located at 135th Street and Lenox Avenue in Harlem, and the New York Public Library for the Performing Arts, located at Lincoln Center. In addition to their reference collections, the Library for the Performing Arts and the SIBL also have circulating components that are administered as ordinary branch libraries.