A saturated solution of cyanuret of potassium, applied with a camel's-hair brush. After the marking ink disappears, the linen should be well washed in cold water.

176. How To Take Ink Out Of Boards

Strong muriatic acid, or spirits of salts, applied with a piece of cloth; afterwards well washed with water.

177. How To Take Writing Ink Out Of Paper

Solution of muriate of tin, two drachms; water, four drachms. To be applied with a camel's-hair brush. After the writing has disappeared, the paper should be passed through water, and dried.