The gilding satisfactorily accomplished, the artist or amateur has only to add the finishing tints and touches to his work, and then either to leave it alone, or to varnish it in accordance with the directions which will be given presently. If the work has been executed on canvass, it will remain only to apply it to the surface for which it may have been destined. This may be done by painting that surface with thick white lead, in two or three coats, and by also similarly painting the back of the canvass. The latter being then pressed evenly down upon the former, while the white lead upon both is still tacky, and, left for a few days, will be found to have attached itself with the greatest tenacity. Scrolls and panels cut out of zinc sheets may be painted upon just as though they were cut out of canvass, and may be fixed in their places by nails or screws. In illuminating on wood, pretty effects may be obtained by varnishing partially with transparent colours, such as the lakes, umber, Prussian blue, burnt sienna, &c., so as to allow the grain of the wood to show through,--restricting the use of opaque colour and gilding to a few brilliant points. Distempering is a method of colouring walls and ceilings in which powder colour, ground up in water, and mixed with sufficient size to fix the colour, is used instead of paint made with oil. The most simple employment of distemper is in whitening ceilings, but it is also very much used in theatrical decoration and scene-painting; and rooms are sometimes so ornamented, the process being much less expensive than oil-painting. The foundation of all the colours is whiting, which, having been set to soak in water and break up of itself, is (when the top water is poured off) in a fit state for use; common double size is then added, with as much of the colour as will make the desired tint; but as this, when dry, will be many shades lighter than it appears when wet, trials should be made on paper, and dried by the fire till the colour required be attained. A gentle heat is required for melting the size. Old walls are prepared for distemper by being scraped and cleaned, and a coat of "clearcole" given to them. This is merely thin size and water with a little whiting: it serves to wash and smooth the walls and stop suction. Should there be any cracks or holes, a thick paste of size-water and whiting is laid in them with a palette-knife, and, when dry, smoothed down with pumice-stone, and another coat of clearcole given, when the wall is in a proper state to receive the ground tint; for new walls one coat of clearcole is sufficient. If it is intended to lay on lines of various colours, the wall is, previous to the laying on of the ground tint, set out as previously described; and the appropriate colours put on in succession, according to the design to be followed. All the colours required should be ground up, and kept ready prepared in galley-pots well covered over, so as to be at hand at once. The colour