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Deep Yellow Malleable Brass
3378. Το Soften Brass. Heat it to a cherry red, and plunge it into water. 3879. To Cover Brass with Beautiful Lustre Colors. Dissolve 1 ounce cream of tartar in 1 quart boiling water; then add 1/2 ounce protochloride of tin dissolved in 4 ounces cold water. Next heat the whole to boiling, and decant the clear solution from a trifling precipitate, and pour, under continual Melt together 4 parts copper and 1 part zinc. stirring, into a solution of 3 ounces hyposul-