Take of pitch one pound, fat or grease a quarter of a pound, melt them together, and add finely powdered chalk to make it of a pretty stiff consistence; spread it over your tenons and within the mortices previous to pining your work together; it will thus prevent the ingress of moisture and preserve your framing for a considerable length of time.

Another Method

Take one pound of white lead and mix with two pounds of glue, let them well boil and then strain; this is a more simple and much readier process, and for joints of sign boards, shutters, entablatures, and all exterior work, is by far the best.