13. _To scour Boards._--Mix together one part lime, three parts common sand, and two parts soft soap; lay a little of this on the scrubbing-brush, and rub the board thoroughly. Afterwards rinse with clean water, and dry with a clean coarse cloth. This will keep the boards a good color: it is also useful in keeping away vermin. For that object, early in the spring, beds should be taken down, and furniture in general removed and examined; bed-hangings and window-curtains, if not washed, should be shaken and brushed; and the joints of bedsteads, the backs of drawers, and indeed, every part of furniture, except polished mahogany, should be carefully cleaned with the above mixture, or with equal parts of lime and soft soap, without any sand. In old houses, where there are holes in the boards, which often abound with vermin, after scrubbing in, as far as the brush can reach, a thick plaster of the above should be spread over the holes, and covered with paper. When these things are timely attended to, and combined with general cleanliness, vermin may generally be kept away, even in crowded cities. 14. _To wash Stone Stairs and Halls._--Wash them first with hot water and a clean flannel, and then wash them over with pipe-clay mixed in water. When dry, rub them, with a coarse flannel. 15. _To take Oil and Grease out of Floors and Stone Halls._--Make a strong infusion of potash with boiling water; add to it as much quick-lime as will make it of the consistence of thick cream; let it stand a night, then pour off the clear part, which is to be bottled for use. When wanted, warm a little of it; pour it upon the spots, and after it has been on them for a few minutes, scour it off with warm water and soap, as it is apt to discolor the boards when left too long on them. When put upon stone, it is best to let it remain all night; and if the stain be a bad one, a little powdered hot lime may be put upon it before the infusion is poured on. 16. _To clean Marble._--Muriatic acid, either diluted or pure, as occasion may require, proves efficacious. If too strong, it will deprive the marble of its polish, which may be easily restored by the use of a piece of felt, with some powder of putty or tripoli, with either, making use of water. 17. _To clean Marble. Another way._--Mix ¼ lb. of soft soap with the same of pounded whiting, 1 oz. of soda, and a piece of stone-blue the size of a walnut; boil these together for ¼ of an hour; whilst hot, rub it over the marble with a piece of flannel, and leave it on for 24 hours; then wash it off with clean water, and polish the marble with a piece of coarse flannel, or what is better, a piece of an old hat.