Show rare boole filmed the rare and valuable volumes of the sterling library ot of yale are being preserved ty by copying on tiny films jn in this way persons interested may be allowed to consult and examine the works without the necessity of risking the originals thirty two hundred pages may be copied on feet of film and at the rate of or pages an hour A book of pages may be copied on a film which when rolled Is no larger than a spool of cotton the films when properly cared for are almost everlasting |