number of trifling errors are preferable to the huge and unpardonable error of not accomplishing the work at all. From what has been said, it will be apparent that the publication of this catalogue is carried on under very different conditions from those habitual in similar undertakings. Three thousand pounds a year must be spent upon it; or, as regards Museum purposes, must be thrown away. Any balance unexpended at the end of the financial year must revert to the Treasury, and would be an uncompensated loss as regards the Museum. This misfortune has hitherto been avoided—partly by an energy and diligence on the part of the gentlemen employed, of which it is impossible to speak too warmly or too gratefully—partly by a resolute determination not to aim at an ideal perfection, which, under the circumstances, would be absolutely mischievous.
Ordinary visitors to the library may from one point of view be divided into two classes, those who are astonished that it has not got every book in the world, and those who marvel that it possesses so many books as it does. Nothing is commoner than the remark, "I suppose you have everything that ever was printed," unless it is the exclamation, "You surely do not keep all the rubbish!" These two sets of ideas may be taken to represent the two tendencies which affect every public library; and by consequence every complete catalogue of its contents, that of mechanical accretion, and that of intelligent selection. The operation of the Copyright Act is, of course, responsible for most of the
