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To Whiten Smoked Walls

A washed, it should be scratched with a stiff brush, to remove every particle of loose lime from the surface; after which it should be thoroughly swept down with a broom, and coated with the glue size or thin paste. (Sce method of cleaning and whitening smoked walls consists, in the first place, of rubbing off all the black, loose dirt upon them, by means of a broom, and then washing them down with a strong soda lye, which is to be No. 2808.) afterward removed by means of water to 2812. Utensils for Paper Hanging. which a little hydrochloric acid has been A long table of thin boards cleated together added. When the walls are dry a thin coat- and placed on wooden horses, such as are ing of lime, with the addition of a solution of used by carpenters, a pair of sharp shearsalum, is to be applied. After this has be- with long blades, if possible-a whitewashcome perfectly dry the walls are to be kalso- brush, a pail for paste, and a yard of cotton mined or coated with a solution of glue and cloth, are the implements required. The. chalk. 2807. To Color, and Prevent Whitewash Rubbing Off. Alum is one of the best additions to make whitewash of lime table or board platform should be level on its upper surface to facilitate the distribution of the paste. The latter should be free from lumps, and should be laid on as evenly as which will not rub off. When powdered possible. It should be made of good sweet chalk is used glue water is also good, but ryo or wheat flour, beaten smooth in cold wawould not do for outside work exposed to ter before boiling, and should not be allowed much rain. Nothing is easier than to give it to boil more than a minute or two, but should any desired color by small quantities of lamp- be raised to the boiling point slowly, being black, brown sienna, ochre, or other coloring continually stirred till it is taken from the material. fire. (See No. 2272.)