Scientific American 32, 26.4.1851

As the time is now at hand for whitewashing on a large scale, we will give a receipt which is the best nown for out-houses. Take half a bushel of good unslacked lime, slack it with boiling water and keep it covered during the slacking process. Strain the liquid through a sieve, ad add a peck of clean salt dissolved in warm water, add three pounds of boiled rice or wheat paste and half a pound of dissolved glue. Add five gallons of water to this mixture, and it is best to put it on hot, but in that case use only old brushes, or make allowance for spoiling of them.

It has been found that our dry winds bite off, as it were, more of the whitewash than do rains. The salt is to obciate this evil. For whitewashing the interior of dwellings, do not use any salt, as it absorbs moisture, and to the above lime, add about two pounds of Spanish whiting. It makes the white more clear looking if a little indigo is squeezed through a cloth amongst it. Amongst the lime, Spanish brown or ochre may be stirred to make a colored lime paint. The sulphate of iron (copperas) makes a buff color; the sulphate of copper (blue vitriol) a blueish color.

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