John Rylands Library assembled by George Spencer, 2nd Earl Spencer, which Mrs Rylands purchased from Lord Spencer in 1892. She had begun acquiring books in 1889 and continued to do so throughout her lifetime. After its inauguration on 6 October 1899 (the wedding anniversary of John Rylands and Enriqueta Tennant) the library opened to readers and visitors on 1 January 1900. The John Rylands Library and the library of the University of Manchester merged in July 1972 and was named the John Rylands University Library of Manchester. Special collections built up by both libraries were progressively concentrated in the Deansgate building. The building
John Rylands Library prevent the air being 'fouled by the opening of the outer doors' with internal swing doors between the circulation areas and the main library to 'preserve the valuable books from injury'. By 1900 the ventilation system had evolved to include electric fans to draw in air at pavement level through coke screens sprayed with water. On opening in 1900, the library had 70,000 books and fewer than 100 manuscripts and by 2012, more than 250,000 printed volumes and over one million manuscripts and archival items. The main foundation of the library's collections acquired in 1892 was the "Althorp Library" of