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Coating for Black-Boards

Incorporate flour-emery with shellac varnish, adding sufficient lampblack to give the reter containing a little hyposulphite of soda. quired color. If too thick, reduce its consis- Undyed linen and cotton goods of all kinds, tency with alcohol. This varnish, applied to however soiled or dirty, are rendered snowy the surface of wood with a camel's hair varwhite in a very short time by merely placing nish brush, produces an excellent black facthem in the liquid mentioned. For the pre-ing, and may also be used for preparing paration of Javelle water, take 4 pounds bi- smaller writing tablets. carbonate of soda, and 1 pound chloride of 6406. Beautiful Black Ink. Take a lime; put the soda into a kettle over the fire, sufficient quantity of elder berries, bruise and add 1 gallon boiling water, let it boil from 10 keep them for 3 days in an earthen vessel; to 15 minutes, then stir in the chloride of then press out and filter the juice. To 12 lime, avoiding lumps. When cold, the liquid pints of the filtered juice, add 1/2 ounce each of can be kept in a jug ready for use. (See No. sulphate of iron, and crude pyroligneous acid. 4787.) The ink that results has, when first used, a