the costliness of extending any premises that may be situated in a good quarter, and surrounded by shops, or warehouses, or public buildings. The possibilities of future extension should never be lost sight of when a site for a library is selected. But, as the most desirable site cannot always be had, it is still more important so to plan the library from the first that it may be susceptible of inner development, without trenching upon the adjoining land; and where, in the case of existing libraries, this precaution has been neglected, to lose no time in adapting the library for interior extension, if possible. At the Museum we have at present two methods—the sliding-press, whether suspended or resting on the ground, and the pivot-press. Both these have been described to you. But they by no means exhaust the possibilities of economising space, and I wish to draw your attention to other ingenious methods, which, however, I am not about to describe, for I take this to be the proper business of the inventor. That they must be worth attention you will all agree, when I tell you they are devised by Mr. Virgo. Mr. Virgo, as his name seems to imply, is a gentleman of singular modesty. I do not think that, but for me, he would ever have received the credit due to him for his share in the invention of the sliding-press; nor do I think that he has done nearly enough to bring his ingenious ideas forward for the general good. I hope he will do so, either at this meeting, or ere long in the pages of The Library, or some other suitable medium, I shall not attempt to trespass upon his
