Damp walls may be dealt with in the following manner: Mix two quarts of- tar with two ounces of kitchen fat, and boil together for a quarter of an hour. Then add some slaked lime and very finely pounded glass. The lime and glass must be in the proportion of two to one, and thoroughly mixed. Apply immediately, as the mixture soon sets and becomes hard. A coat an inch thick will usually quite overcome the dampness, though in extreme cases two coats may be necessary.