Mechanics Institute, ca. 1915. The General Society of Mechanics and Tradesmen was founded as an institution in 1785 to provide cultural, educational and social services to families of skilled craftsmen. In 1820 the General Society opened one of the city’s first free schools. Following the city getting its act together regarding public education, the Society converted their free public school in the Mechanics Institute in 1859. The Mechanics Institute provided adult education, particularly in technical subjects, and library was thought to be an alternative venue for adults (to keep the working classes from gambling and drinking). In 1899 the General Society moved into the Renaissance-style building on 44th Street. The building had been constructed in 1891 as the Berkeley School, a private boy's prep school. Designed by Lamb & Rich, the building had the look of a library or professional association, with large banks of windows on the second and third floors. The school founder sold the building to the General Society after some financial issues, and the large drill hall on the first floor was converted into the library. In 1905 the General Society also had architect Ralph Townsend add three stories to the top of the building and remove the the stoop to create a ground-floor entrance. Today the building continues to provide free educational programming. And in a contentious deal in 2008 the institution sold their unused air rights, which allowed a developer to add additional stories to an already planned new building around the corner.