 For example, to limit the growing number of Jewish students between 1919-1950s a number of private liberal arts universities and medical and dental schools employed Numerus clausus.These included Harvard University, Columbia University, Cornell University, and Boston University.In 1925 Yale University, which already had such admissions preferences as "character", "solidity", and "physical characteristics" added a program of legacy preference admission spots for children of Yale alumni, in an explicit attempt to put the brakes on the rising percentage of Jews in the student body.