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Flexible Varnish (Melt pound pounds Boil)

Melt 1 pound 3 pounds. Boil for 2 hours; then add dark of resin, and add gradually 1/2 pound India- gum amber (fused), 8 pounds; hot linseed rubber in very fine shavings, and stir until oil, 2 gallons; boil for two hours, proceeding cold. Then heat again, slowly, add 1 pound as in the last receipt, thinning down with oil linseed oil varnish, heated, and filter. of turpentine, 30 gallons. Used for the same