To white-wash Plaster Walls.

It must be supposed the Wall is very well plastered, with very fine Plaster well layed; after which, you may whiten it with Lime-milk very clear, as shall hereafter be descri∣bed. The Wall should be very well wetted with Water, for all the Secret consists in the White not drying too fast, but rather very slowly, which gives the Lime time to fasten, drying leisurely; and thus the Walls will neither whiten your Hands nor your Clothes. If there were any Dirt upon the Wall, it ought to be scraped off; the same upon Free∣stone, and strike it over equally two or three times. Within an hour or two strike it over with the Palm of your hand, and it will po∣lish like Marble.

The best Lime-milk is made after the Lime has been a long time slack'd, into which ha∣ving put a sufficient quantity of Water, it must be stirred till it make a white Froth on the top, which must be immediately taken off, and kept for Use. The last passing over it ought to be with Milk of unslack'd Lime, that the white may be the glossier.