Under a new pilot agreement that began on October 1, 2014, current Columbia University students, faculty and staff will have on-site library borrowing privileges at Brown University, University of Chicago, Cornell University, Dartmouth College, Duke University, Harvard University, Johns Hopkins University, Massachusetts Institute of Technology, University of Pennsylvania, Princeton University, and Yale University via the new Borrow Direct Plus (Borrow Direct institutions plus Duke University) on-site borrowing program.
See more at http://library.columbia.edu/