The paper for a ceiling is prepared in the same manner as for hanging on a wall. Special attention is, of course, paid to the pasting of the paper, and for obvious reasons it is almost useless to attempt to put a common paper on a ceiling. The paper should be of good quality •, and if the paper is a heavy one, it may, as in the case of heavy wallpapers, be temporarily kept in place by drawing pins. In the case of a paper hung on a wall, the paper, until it is dry, is held in place partly as the result of friction, but principally by the adhesiveness of the paste; but when piper is hung on a ceiling, contact is maintained solely by the adhesiveness of the binding medium. It is necessary, therefore, to prepare the ceiling so that the paper may more readily adhere to it by first thoroughly cleaning the ceiling and then coating or sizing it with a solution of glue and whiting. When this is dry the paper may be hung. If the ceiling is at all rough, it should be smoothed with pumice-stone, as paper will not readily adhere to a rough surface.