A new whitewash for walls

Scientific American, 25.11.1869

A new whitewash for walls , recommended by the Boston Journal of Chemistry, is as follows: Soak one fourth of a pound of glue over night in tepid water. The next day put it into a tin vessel with a quart of water, set the vessel in a kettle of water over the fire, keep it there till it boils, and then stir until the glue is dissolved. Next put from six to eight pounds of Paris white into another vessel, add hot water and stir until it has the appearance of milk of lime. Add the siring, stir well, and apply in the ordinary way while still warm.

"Paris white" is sulphate of baryta, and may be found at any drug or paint store.

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