Complex sentence: The Humanities and Social Sciences Library on 42nd Street is still the heart of the NYPL's research library system, but the SIBL, with approximately volumes and 60,000 periodicals, is the nation's largest public library devoted solely to science and business.
Split into simpler sentences: 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.