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Show coarse powder, is to be put into a porcelain vessel with the soda, then add 230 grams (1,000 grams equals 1 kilog, about 2 pounds English), and boil until the extract is dissolved and the solution has a reddish tint. Then take it off the fire add the glycerine gly-cerine and then the chromate and the gum which can be dissolved in a little water. Stationer & Printer. Capying Ink. A writer in a recent issue of a French scientific paper gives the following formula for the manufacture of a copying ink, by means of which a number of excellent excel-lent copies can, he says, be obtained without the aid of a copying press.' logwood extract,23 grams; soda crystals crys-tals 34 grams; chromate of lead (neutral,) i gram; gum acacia, I grams; glycerine, 28 grams, and a sulnciant quanity of distilled water. I The logood extract, in the form of a |